​Quadrilateral ABCD​ is inscribed in this circle.



What is the measure of angle B?

Enter your answer in the box.

m∠B=
°

A quadrilateral inscribed in a circle. The vertices of quadrilateral lie on the edge of the circle and are labeled as A, B, C, D. The interior angle B is labeled as left parenthesis 6 x plus 19 right parenthesis degrees. The angle D is labeled as x degrees.

Two sample t-tests are designed to learn if there is support for a relationship between variables when there are two independent groups and we want to compare their means.

Specifically, the two sample t-test is used to determine whether the means of two groups are significantly different from each other. The test is based on the assumption that the populations from which the samples are drawn are normally distributed, and that the variances of the two populations are equal.

If these assumptions are met, we can use the two sample t-test to test the null hypothesis that the means of the two groups are equal. The test produces a t-statistic and a p-value, which can be used to determine whether the null hypothesis should be rejected or not.

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Answer: 8

Step-by-step explanation: you multiply 4 times 2 and get 8 basic math

The length of segment AD is given as follows:

AD = 4.

The geometric mean theorem states that the length of the altitude drawn from the right angle of a triangle to its hypotenuse is equal to the geometric mean of the lengths of the segments formed on the hypotenuse.

Hence, in this problem, we have that the altitude of BD = 2 is the geometric mean of DC = 1 and AD, hence:

AD x 1 = 2²

AD = 4 units.

Which is the length of segment AD.

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If f(2) = 1 and the tangent line at x has slope (x − 1)ex2 − 2x. f(x) = ((x^2 - 2x + 1)/2)e^(x^2 - 2x).

To find f(x), we'll first integrate the given slope function to obtain the original function. The slope of the tangent line is given as (x - 1)e^(x^2 - 2x).

Let F'(x) = (x - 1)e^(x^2 - 2x). To find f(x), we need to integrate F'(x) with respect to x:

∫(x - 1)e^(x^2 - 2x) dx

Now, we can use substitution. Let u = x^2 - 2x, then du = (2x - 2) dx. Therefore, the integral becomes:

∫((u + 1)/2)e^u du

Now, we can integrate by parts. Let v = e^u, then dv = e^u du. Let w = (u + 1)/2, then dw = 1/2 du. Using integration by parts formula:

∫w dv = wv - ∫v dw

∫(u + 1)/2 * e^u du = ((u + 1)/2)e^u - ∫(1/2)e^u du

Now integrate the remaining part:

∫(1/2)e^u du = (1/2)e^u + C

Substituting back:

f(x) = ((x^2 - 2x + 1)/2)e^(x^2 - 2x) + C

Now, use the given condition f(2) = 1:

1 = ((2^2 - 2*2 + 1)/2)e^(2^2 - 2*2) + C

1 = (1)e^0 + C

C = 0

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Since each driver can cover at most one route, we will continuous this process until all 12 routes have been assigned to a driver. This will ensure that the school system pays the least amount possible for the 12 bus routes.

To minimize the school system's cost while assigning drivers to the bus routes, follow these steps:

1. Open the file P05_45.xlsx and arrange the data in a clear format, such as a table with drivers listed vertically and routes listed horizontally. Each cell should contain the amount a driver charges for a specific route.

2. Identify the lowest bid for each route. You can do this by going through each column (representing a route) and finding the minimum amount.

3. Assign the driver with the lowest bid to the corresponding route. Make sure to keep track of which drivers have already been assigned to avoid assigning them to multiple routes.

4. Continue this process for all 12 routes. Remember, each of the 16 drivers can only be assigned to one route.

5. Once all drivers have been assigned to the routes, add up the amounts for each assigned driver to find the total cost for the school system.

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the test statistic is 2.576 and the critical value is 1.645.

Since the test statistic is greater than the critical value, we reject the null hypothesis and conclude that there is evidence to support the alternative hypothesis that the mean amount of mercury in tuna fish for the new company exceeds 0.82 ppm.

To make a decision in this scenario, we need to use a hypothesis test. Let's set up the null and alternative hypotheses:

Null hypothesis (H0):

The mean amount of mercury in the tuna fish produced by the new company is less than or equal to 0.82 ppm.

Alternative hypothesis (Ha):

The mean amount of mercury in the tuna fish produced by the new company is greater than 0.82 ppm.

The test statistic is 2.576 and the critical value is 1.645.

Since the test statistic is greater than the critical value and is in the rejection region of the null hypothesis, we reject the null hypothesis.

we cannot say for certain whether this difference is statistically significant without knowing the sample size, the standard deviation of the sample, and the level of significance.

Reject the null hypothesis at the chosen significance level (which we don't have in this case), which suggests that the mean amount of mercury in the tuna fish produced by the new company is likely to be greater than 0.82 ppm.

This means that we have evidence to suggest that the mean amount of mercury in the tuna fish produced by the new company exceeds 0.82 ppm, as suspected by the scientist at the FDA.

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The alternative hypothesis would be: The proportion of BYU students who identify as Democrat and support the death penalty is significantly less than the proportion of BYU students who identify as Republican and support the death penalty.

The alternative hypothesis for this test would be: The proportion of BYU students who identify as Democrat and support the death penalty (p1) is less than the proportion of BYU students who identify as Republican and support the death penalty (p2). Mathematically, it can be written as:

H1: p1 < p2

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The people do you have to sample size to be 95% certain you can identify a difference of 1% is 9604.

A minimum sample size is the number of participants required to provide findings that accurately reflect the community under investigation while yet maintaining the intended confidence interval (margin of error) and confidence level.

The process of deciding how many observations or replicates to include in a statistical sample is known as sample size determination. Any empirical study with the aim of drawing conclusions about a population from a sample must take into account the sample size as a crucial component.

As we are given here a margin of error of 0.01. Also from standard normal tables, we have here:

P(-1.96 < Z < 1.96) = 0.95

Therefore 1.96 is the z critical value that is to be used here.

As we are not given a prior proportion value here, we take p = 0.5, to get a conservative value of the sample size.

The margin of error now is computed as:

MOE = x*P(1 - p)

n = 22 P(1-7 .)2 x 0.25 = 9604 MOE2

Therefore 9604 is the required minimum sample size here.

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In the original Milgram experiment, only men participated, and the study aimed to investigate their obedience to authority figures. Later, a version of the experiment was conducted with only women participants to compare their obedience levels to men's.

In the replication of the Milgram experiment with only women participants, the level of obedience was found to be similar to that of the original experiment with only men. In fact, the results showed that women were just as likely as men to obey authority figures and administer the maximum level of electric shocks to the supposed "learner" in the experiment. This suggests that obedience to authority is not gender-specific and that both men and women can be equally susceptible to obeying orders, even when they conflict with their own moral beliefs.

To answer your question, women's obedience in the Milgram experiment was found to be similar to men's obedience. Both genders displayed high levels of obedience to the authority figure, even when instructed to administer painful electric shocks to the "learner." This result suggests that obedience to authority is not solely dependent on gender but is rather a widespread human tendency.

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The dimensions of the rectangular box are height = 7 ft, width = 28 ft, and length = 112 ft.

Let the height of the box be h. Then, the width is 4h, and the length is 16h. We know that the volume of the box is 343 ft³, so we can set up the equation: V = l*w*h = (16h)(4h)(h) = 64h³

64h³ = 343

h³ = 343/64 = 27/4

h = (27/4)^(1/3) = 3/2

So the height of the box is 3/2 ft. Using this value, we can find the width and length:

Width = 4h = 4(3/2) = 6 ft

Length = 16h = 16(3/2) = 24 ft

Therefore, the dimensions of the rectangular box are height = 7 ft, width = 28 ft, and length = 112 ft.

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Answer:

George had $725 in savings

Step-by-step explanation:

Let's assume that George had x dollars in savings before he bought the camera.

According to the problem, George spent 80% of his savings to buy the camera, which means he had 20% of his savings left after the purchase. We can write this as:

0.20x = amount of savings left after buying the camera

We also know that the camera cost $580. We can set up an equation to relate the cost of the camera to the amount of savings that George had before buying the camera:

0.80x = $580

Solving for x, we get:

x = $580 / 0.80

x = $725

Therefore, George had $725 in savings before he bought the camera.

We can say with 95% confidence that the true mean amount that women in the population spend dining out per week lies within the range of $91.74 to $108.26.

Based on the given information, we can calculate a 95% confidence interval for the mean amount that women in the population spend dining out per week. With a sample size of 25 and a standard error of $4, we can use the formula:

95% CI = sample mean +/- (critical value x standard error)

To find the critical value, we need to look up the t-distribution with degrees of freedom (df) = n-1 = 24 and a significance level of alpha = 0.05/2 = 0.025 (since we are interested in a two-tailed test). From a t-table or calculator, we find that the critical t-value is approximately 2.064.

Plugging in the values, we get:

95% CI = $100 +/- (2.064 x $4)
95% CI = $100 +/- $8.26
95% CI = ($91.74, $108.26)

Therefore, we can say with 95% confidence that the true mean amount that women in the population spend dining out per week lies within the range of $91.74 to $108.26. This means that if we were to repeatedly take random samples of 25 women and calculate their mean amount spent dining out, about 95% of the intervals we construct using this method would contain the true population mean.

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We get x = 59. Therefore, your TA should apply to 59 schools to have a greater than 95% chance of being admitted to at least one school.

To calculate the number of different schools your TA needs to apply to in order to have a certain chance of being admitted to at least one school, we can use the formula:

n = log(1 - p) / log(1 - q)

Where n is the number of schools, p is the desired probability of being admitted to at least one school (i.e. 0.9 or 0.95), and q is the probability of not being admitted to any one school (i.e. 0.95).

Using this formula with p = 0.9 and q = 0.95, we get:

n = log(1 - 0.9) / log(1 - 0.05)
n ≈ 14

So your TA would need to apply to at least 14 different schools to have a chance of being admitted to at least one school above 90%.

Using the same formula with p = 0.95 and q = 0.95, we get:

n = log(1 - 0.95) / log(1 - 0.05)
n ≈ 29

So your TA would need to apply to at least 29 different schools to have a chance of being admitted to at least one school above 95%.
To determine the number of schools your TA needs to apply to in order to have at least a 90% and 95% chance of being admitted to at least one school, we'll use the concept of complementary probability.

Step 1: Calculate the probability of NOT being admitted to any school
The probability of not being admitted to a single school is 95% (100% - 5%).

Step 2: Use complementary probability to find the required probability
Let x be the number of schools your TA needs to apply to. The probability of not being admitted to any of the x schools is (0.95)^x.

Step 3: Find the number of schools for a 90% chance
We want the probability of being admitted to at least one school to be above 90%. Therefore, we want the complementary probability to be less than 10% (100% - 90%):
(0.95)^x < 0.10

Solving for x, we get x = 45. Therefore, your TA should apply to 45 schools to have a greater than 90% chance of being admitted to at least one school.

Step 4: Find the number of schools for a 95% chance
Similarly, for a 95% chance, we want the complementary probability to be less than 5% (100% - 95%):
(0.95)^x < 0.05

Solving for x, we get x = 59. Therefore, your TA should apply to 59 schools to have a greater than 95% chance of being admitted to at least one school.

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An important application of the chi-square distribution is testing for goodness of fit and testing for the independence of two variables The correct answer is c. both of the above.

The chi-square distribution is a probability distribution that is used in statistics for hypothesis testing and confidence interval estimation. Two important applications of the chi-square distribution are testing for goodness of fit and testing for the independence of two variables.

Testing for goodness of fit involves comparing observed data to expected data, and determining whether the differences between the observed and expected data are statistically significant. The chi-square distribution is used to calculate a test statistic, which measures the degree of divergence between the observed and expected data.

Testing for the independence of two variables involves examining whether there is a relationship between two categorical variables. The chi-square distribution is used to calculate a test statistic that measures the degree of dependence or independence between the two variables. If the test statistic is large enough, it indicates that there is a significant relationship between the two variables.

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To leave the radiator filled with a 55% antifreeze solution, 3 liters of the 25% solution of antifreeze must be removed and replaced with 3 liters of a 75% antifreeze solution.

We start by calculating the amount of antifreeze in the initial solution. Since the solution is 25% antifreeze, the amount of antifreeze in the solution is 25% of 5 liters, or 1.25 liters.

Let x be the amount of 75% antifreeze solution that must be added. We can set up the equation for the amount of antifreeze in the final solution as follows:

1.25 - 0.25(3) + 0.75x = 0.55(5)

Simplifying and solving for x, we get:

x = 3

Therefore, 3 liters of the 25% antifreeze solution must be removed from the radiator and replaced with 3 liters of the 75% antifreeze solution to leave the radiator filled with a 55% antifreeze solution.

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To find (F-1)(1) for the given function f(x) = 41, we need to find the inverse function F-1(x), which is simply 41. Then, we evaluate F-1(1) to get the answer of 4.

The given function f(x) = 41 is a constant function, meaning that it has the same output value of 41 for every input value of x. In order to find (F-1)(1), we need to find the inverse function of f(x), denoted as F-1(x), and then evaluate F-1(1).

To find the inverse function, we need to switch the roles of x and f(x) in the function f(x) = 41 and solve for x. This gives us x = 41, which means that the inverse function is F-1(x) = 41. This is because F-1(f(x)) = x, so F-1(41) = x.

Now, we can evaluate F-1(1) by substituting 1 for x in the inverse function. This gives us F-1(1) = 41. Therefore, the answer is (d) 4.

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Yes, it is true that an OLS (ordinary least squares) estimator meets all three small sample properties (unbiasedness, efficiency, and minimum variance) under certain conditions, in addition to being consistent.

These conditions include the assumption that the error term has a zero mean and constant variance, and that the errors are independent and identically distributed (IID). When these assumptions hold, the OLS estimator is considered to be BLUE (Best Linear Unbiased Estimator) and is a reliable tool for estimating the unknown parameters in a linear regression model. However, it is important to note that these assumptions may not always hold in practice, and alternative estimation methods may need to be considered.

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Answer: 75

Step-by-step explanation:

To find the sum of these numbers, we simply add them together:

15 + 28 + 12 + 20 = 75

Therefore, the sum of 15, 28, 12, and 20 is 75.

Queueing system can be analyzed using queueing theory to determine performance measures such as the average queue length, average waiting time, and utilization of the service channels.

The queueing system you have described can be modeled as an M/M/7 queue, where:

M represents that inter-arrival times and service times are exponentially distributed.

M represents that the arrival process is memoryless, meaning that the probability of a customer arriving at any given time does not depend on the previous arrival times or the state of the system.

7 represents the number of service channels, or lanes, available for customers to pay their toll.

The notation for this system is M/M/7, which indicates that it has an infinite queue capacity and that there is no limit to the number of customers that can be waiting in the queue.

In this queueing system, customers arrive randomly and independently, and they join the queue if all lanes are busy. They are served on a first-come, first-served basis, with the service times also being exponentially distributed.

This queueing system can be analyzed using queueing theory to determine performance measures such as the average queue length, average waiting time, and utilization of the service channels.

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Therefore, The number of different slates of officers that can be elected is 5,040. This is calculated using the permutation formula with 7 positions to fill and 7 members who can be elected to each position.

To find the number of different slates of officers that can be elected, we need to use the permutation formula. The formula for permutations is n!/(n-r)!, where n is the total number of items and r is the number of items selected. In this case, we have 7 positions to fill and 7 members who can be elected to each position. Therefore, the number of different slates of officers that can be elected is 7!/(7-7)! = 7! = 5,040.
There are seven positions that need to be filled including president, vice president, recording secretary, corresponding secretary, treasurer, historian, and statistician. Each member can be elected to any position and can only hold one position. To find the number of different slates of officers that can be elected, we use the permutation formula. We have 7 positions to fill and 7 members who can be elected to each position, so the number of different slates of officers that can be elected is 7!/(7-7)! = 7! = 5,040.

Therefore, The number of different slates of officers that can be elected is 5,040. This is calculated using the permutation formula with 7 positions to fill and 7 members who can be elected to each position.

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Over 20 years, the truck driver would earn more than the bank teller, with a total income of $700,166.40 compared to $468,000 for the bank teller.

We have,

To compare the incomes of a truck driver and a bank teller over 20 years, we need to first convert their incomes to a comparable time period.

Assuming that they work for the same number of weeks in a year, we can use the following conversions:

Truck driver:

$35,000 per year = $673.08 per week

Bank teller:

$450 per week = $23,400 per year

Now, if we assume that their incomes remain constant over the 20-year period, we can calculate their total incomes as follows:

Truck driver:

= $673.08 per week x 52 weeks per year x 20 years

= $700,166.40

Bank teller:

= $450 per week x 52 weeks per year x 20 years

= $468,000

Therefore,

Over 20 years, the truck driver would earn more than the bank teller, with a total income of $700,166.40 compared to $468,000 for the bank teller.

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The increase in obesity rates in the United States, particularly among teenagers, can have a significant impact on the size of the government debt, even if the dependency ratio remains constant.

Obesity is linked to an increased risk of chronic diseases such as type 2 diabetes, heart disease, and certain cancers. These chronic diseases require costly medical treatments and care, which can put a strain on the government's finances. In turn, the government may need to spend more on healthcare programs, such as Medicaid and Medicare, to cover the costs of treating these chronic diseases.

Additionally, obesity can lead to a reduction in economic productivity and an increase in disability rates, which can result in lower tax revenues and higher disability payments. This reduction in economic productivity can also have a negative impact on economic growth, further exacerbating the debt problem.

Therefore, the increase in obesity rates in the United States can lead to increased government spending on healthcare and disability programs, lower tax revenues, and slower economic growth. All of these factors can contribute to an increase in the size of the government debt.

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Answer:

x=-2.5(ERROR)

Step-by-step explanation:

An isosceles triangle is a triangle with two sides of equal length, called legs. The third side of the triangle is called the base. The vertex angle is the angle between the legs 1.

Since triangle ABC is an isosceles triangle with vertex angle B, we know that AB = AC.

Therefore, we can set up an equation:

20x - 2 = 25x

Solving for x:

20x - 25x = 2

-5x = 2

x = -2/5

Since x cannot be negative, there must be an error in the problem statement.

I hope this helps!

The sum of the smallest positive 2-digit, 3-digit, and 4-digit multiples of 8 is 11,120.

To be a multiple of 8, a number must be divisible by 8, which means its last three digits must form a multiple of 8. Also, the first digit of the number cannot be 0, since it must be a two-digit number or larger.

Let's start with the two-digit multiple of 8. The smallest two-digit multiple of 8 is 16, which is not a three-digit or four-digit number. The next multiple of 8 is 24, which is also not a three-digit or four-digit number. The smallest two-digit multiple of 8 that is also a three-digit number is 104 (since 112 is not a multiple of 8).

Similarly, the smallest two-digit multiple of 8 that is also a four-digit number is 1008 (since 992 is not a multiple of 8).

Therefore, the three numbers we are looking for are 104, 1008, and 1008, with a sum of:

104 + 1008 + 10008 = 11120

So the sum of the smallest positive 2-digit, 3-digit, and 4-digit multiples of 8 is 11,120.

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The probability of selecting a composition of n with a second part equal to 1 is equal to (n-1)/4.

Let us consider a composition of n as an ordered sequence of positive integers where the sum of the integers is n.

The number of compositions of n is equal to 2ⁿ⁻¹,

Since there are n-1 spaces between the numbers where we can choose to either include or exclude a separator.

To calculate the probability that a randomly selected composition of n has a second part equal to 1,

Consider the second part of the composition.

It can be any positive integer from 1 to n-1, inclusive.

For the second part to be equal to 1,

Choose 1 as the second number in the composition and distribute the remaining n-2 among the remaining slots.

There are n-1 slots left since the second slot is already occupied by the number 1.

The remaining n-2 can be distributed in 2ⁿ⁻³ ways, since there are n-3 spaces left to distribute the remaining numbers.

Therefore, the probability of selecting a composition of n with a second part equal to 1 is,

P = (n-1) ×  2ⁿ⁻³ / 2ⁿ⁻¹

  = ( n - 1 ) × 2ⁿ⁻³⁻ⁿ⁺¹

   =  ( n - 1 ) × 2⁻²

  = (n-1) / 4

Therefore, the probability is equal to  (n-1)/4.

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To verify that all sales that have been shipped to customers have been recorded, a test of transactions should be completed on a representative sample drawn from the sales records or shipping records.

The sample should be chosen randomly and be large enough to provide a reasonable level of confidence in the accuracy of the recorded transactions. This test will help ensure that all sales have been properly recorded in the accounting system and that there are no unrecorded sales. It is important to perform this test on a regular basis to maintain the integrity of the financial records.

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This means that we can be 95% confident that the true population means difference lies between 1.7075 and 10.2925.

Confidence interval = Mean difference ± (t-value × standard error)

Substituting the given values into the formula, we get:

Confidence interval = 6 ± (2.045 × 2.1)

Confidence interval = 6 ± 4.2925

A confidence interval is a statistical concept used to estimate the range of values in which a population parameter is likely to fall. It is calculated using sample data and is used to provide an estimate of the true population parameter.

The confidence interval is a range of values that is constructed around a point estimate, such as the sample mean or proportion. This range is based on the level of confidence chosen by the researcher, typically 90%, 95%, or 99%. For example, a 95% confidence interval means that if we were to repeat the sampling process many times, we would expect the true population parameter to fall within the range of values calculated for 95% of those samples.

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If a relationship exists between a response variable Y and a predictor variable X, it is appropriate to say that X causes variation in Y is True.

There could be other factors or variables that influence the relationship between X and Y. It is important to distinguish between correlation and causation.
To establish causation, a researcher needs to conduct a controlled experiment, where all other factors are held constant except for the predictor variable X.

This will allow the researcher to isolate the effect of X on Y and determine whether it is indeed causing variation in Y.
In conclusion, while a relationship between X and Y may suggest causation, it is not appropriate to make that assumption without conducting a controlled experiment or considering other factors that may be influencing the relationship.
True. If a relationship exists between a response variable Y and a predictor variable X, it is appropriate to say that X causes variation in Y.
In statistics, response variables, also known as dependent variables, are the outcomes we are interested in explaining or predicting.

Predictor variables, also called independent variables, are the factors that might influence these outcomes.

When analyzing data, we often use regression models to determine the strength and direction of the relationship between the response variable Y and the predictor variable X.
A positive relationship between X and Y means that as X increases, Y also increases, while a negative relationship implies that as X increases, Y decreases.

A strong relationship between the variables indicates that the predictor variable X accounts for a significant portion of the variation in the response variable Y.
However,

It's crucial to note that a correlation between X and Y does not guarantee causality.

Confounding variables, which are factors not included in the analysis but may influence the response variable, could be causing the observed relationship.

Further analysis,

Such as experiments or controlling for potential confounding variables, might be needed to establish causation.
In summary,

When a relationship exists between a response variable Y and a predictor variable X, it is appropriate to say that X causes variation in Y, but it's important to consider that correlation does not necessarily mean causation.

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The mean of the given data is 194.25 and the standard deviation from the given data is 18475.6875.

(a) Given that, the size of rocks at both 5 m and 25 m from the base of the cliff.

Using given mean and standard deviation formulae, we get

Here, mean=3885/20

= 194.25

Standard deviation=369513.75/20

= 18475.6875

Therefore, the mean of the given data is 194.25 and the standard deviation from the given data is 18475.6875.

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