It is possible that the standard deviation is greater than the mean for a list of positive numbers.
What is standard deviation?
The standard deviation is a metric that reveals how much variance from the mean there is, including spread, dispersion, and spread. A "typical" variation from the mean is shown by the standard deviation. Because it uses the data set's original units of measurement, it is a well-liked measure of variability.
Take into consideration, the list of numbers -
1,2,3,4,5,20
The mean formula is - Number of observations / Total observations.
Substitute the values in the equation -
Mean = 1 + 2 + 3 + 4 + 5 + 20 / 6
Mean = 35 / 6
Mean (x') = 5.833
The number of observations is n = 6
The variance is the sum of squared deviations from the mean divided by
n−1.
The standard deviation is the square root of the variance -
s = {√(1 - 35/6)² + .... + (20 - 35/6)²} / (6-1)
s = 7.0828
Therefore, the standard deviation is higher than the mean.
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For the period 1995-2002, the total personal expenditures (in billions of dollars) in the United States for food, f(x), and for housing, h(x), can be described by the equations shown below, where x is the number of years past 1995.†
f(x) = 40.74x + 742.65 and h(x) = 47.93x + 725
Find the year in which these expenditures were equal and the amount spent on each. (Round the year up. Give the amount correct to the nearest whole billion.)
year______
amount ______
Years: 2.455 years
Amounts: $843 billions
This can be solved by using equation solving method.
What is personal expenditures?An expense classified as personal is one that is not related to a trade or enterprise, a passive activity, or an investment. Personal consumption spending is often divided into two categories: goods and services. Groceries, automobiles, and fuel are a few examples of products. Rent, medical treatment, and insurance are a few examples of services.
f(x) = 40.74x + 742.65
h(x) = 47.93x +725
For f(x) = h(x),
40.74x + 742.65 = 47.93x +725
47.93x - 40.74x = 742.65 - 725
x (47.93-40.74) = 17.65
x = 17.65 /7.19 = 2.455 years.
2.455 years after 1995, that is in 1998, these expenditures would be equal to each other.
The amount spent on each would be :-
40.74(2.455) + 742.65 = $842.667
= $843 billions.
Years: 2.455 years
Amounts: $843 billions
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ATP singles rankings for tennis players rank Rafael Nadal as 2 and Roger Federer as 1. This is an example of an interval scale. True or false
The required ATP singles rankings for tennis players rank is false.
What are ATP signals?An interval scale is a type of measurement scale that has equal units of measurement and a zero point, meaning that differences between scale values can be meaningfully compared, but there is no meaningful interpretation of the zero point.
In tennis, ranking points are assigned based on a player's performance in a set number of tournaments over a rolling 52-week period, but the actual number of points assigned to a player is not an interval scale.
Thus, it is incorrect to say that the ATP singles rankings for tennis players are an example of an interval scale.
The given statement is false.
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given the following histogram for a set of data, how many values in the data set are greater than 10.5 but less than 12.5?
The number of values greater than 10.5 and less than 12.5 is 5. By adding the frequencies between these quantities, we could get the number.
A histogram is a graph representing frequency distribution of data points in a dataset. In one axis the data points are given, and the other axis is the frequency. It can be used in both discrete and continuous dataset. In discrete data, there will be individual data points and for continuous it will be a range.
Here the given dataset is a continuous dataset. The frequency of datapoints between 10.5 and 11.5 is 2 and frequency between 11.5 and 12.5 is 3. So the total will be 2+3 = 5.
So the frequency or values between 10.5 and 12.5 is 5
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The complete question is in the image.
20. What area of the figure below if one square is 1cm x 1cm? a. 6 cm ² b. 8cm ² c. 10 cm². d. 12cm ²
The area of figure above is a) 6cm²
Square Area FormulaIn addition to the circumference, a square shape also has an area, where the area of a square is calculated by squaring the length of its side.
Formula: Area of square= s²
The question above, the side of square is 1 cm.
so the area of one small square is 1×1= 1cm²
Because the shape is contain of 6 small square, therefore the total area is 6×1cm²=6cm²
Square propertiesA square has the following properties
Has 4 equal sides Every angle formed by a side is a right angle Each diagonal bisects the angle formed by the sides The intersection of the diagonals forms a right angleLearn more about square at
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Cylinder B is the image of cylinder A after dilation by a scale factor of 4. If the surface area of cylinder A is 137 km, find the surface area of cylinder B, the image.
Answer:
Correct option is C)
Given s= 7m, h=9 m
Lateral surface area = Area of the curved surface =2πrh=2×
7
22
×7m×9m=396m
2
Total surface area = Area of curved surface + Area of two circular surfaces
=2πrh+2πr
2
=396m
2
+2×
7
22
×7m×7m=(396+308)m
2
=704m
2
The surface area of cylinder B is 548 square km.
What is scale factor?A scale factor is defined as the ratio between the scale of a given original object and a new object, which is its representation but of a different size (bigger or smaller).
The basic formula to find the scale factor of a figure is expressed as,
Scale factor = Dimensions of the new shape ÷ Dimensions of the original shape.
Given that, cylinder B is the image of cylinder A after dilation by a scale factor of 4.
The surface area of cylinder A is 137 km².
Then the surface area of cylinder B is 4×137
= 548 square km.
Therefore, the surface area of cylinder B is 548 square km.
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Which statement is true about the function f(x) = 8x³?
The function is even because f(-x) = f(x).
The function is odd because f(-x) = f(x).
The function is even because f(-x) = -f(x).
The function is odd because f(-x) = -f(x).
Answer:
Step-by-step explanation:
Since −f(x) is constant with respect to f, the derivative of −f(x) with respect to f is 0.0
Based on the same previous scenario, calculate the deviation (score - mean). Square each response and then add the deviation squared. Divide the answer by n. What is the variance?
6, 7, 7, 8, 8, 8, 8, 9, 9, 10.
Step-by-step explanation:
1. Calculate the mean of the data: (6 + 7 + 7 + 8 + 8 + 8 + 8 + 9 + 9 + 10) / 10 = 8
2. Subtract the mean from each data point to get the deviation:
6 - 8 = -27 - 8 = -17 - 8 = -18 - 8 = 08 - 8 = 08 - 8 = 08 - 8 = 09 - 8 = 19 - 8 = 110 - 8 = 23. Square each deviation:
-2^2 = 4-1^2 = 1-1^2 = 10^2 = 00^2 = 00^2 = 00^2 = 01^2 = 11^2 = 12^2 = 44. Add up the squared deviations: 4 + 1 + 1 + 0 + 0 + 0 + 0 + 1 + 1 + 4 = 12
5.Divide the sum of squared deviations by the number of data points (n-1), which is 9 in this case: 12 / 9 = 1.33
Answer:
So, the variance is 1.33.
The length of a rectangle is 4 in longer than its width.
If the perimeter of the rectangle is 40 in, find its area.
Answer: 396
Step-by-step explanation:
length- x+4
width - x
perimeter = 40
40 = x+4+x
40-4=2x
36=2x
x=18
length - 18+4=22
width - 18
area = 22*18 = 396
You are given an Isosceles Trapezoid,
If one of the base angles equals 45 then what is the measure of it's opposite angle?
The measure of trapezoid's opposite angle is 135°. The solution has been obtained by using properties of trapezoid.
What is a trapezoid?
Four sides make up the quadrilateral of a trapezoid, two of which are parallel while the other two are not. It is also referred to as a trapezium. A closed, four-sided form or figure known as a trapezoid has its own perimeter and can enclose an area.
We are given that one base angle is equal to 45°
We know that in a trapezoid
Base angle + Opposite angle = 180°
Using this, we get
⇒45° + Opposite angle = 180°
⇒Opposite angle = 180° - 45°
⇒Opposite angle = 135°
Hence, the measure of trapezoid's opposite angle is 135°.
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Consider the following competing hypotheses: Hop=0, H₁0. The value of the test statistic is z = -3.38. If we choose a 5% significance level, then we
O reject the null hypothesis and conclude that the population mean is significantly different from zero
The required, we have strong evidence to suggest that the population means is not equal to zero.
What is the null hypothesis?The null hypothesis, denoted as H0, is a statistical hypothesis that assumes that there is no significant difference between a population parameter and a hypothesized value or between two or more population parameters.
Here,
If we choose a 5% significance level, this means that we are willing to reject the null hypothesis (Hop=0) if the probability of obtaining a test statistic as extreme as, or more extreme than, the observed value under the null hypothesis is less than 5%.
The observed value of the test statistic is z = -3.38. This means that the observed value is 3.38 standard deviations below the mean under the null hypothesis.
We can use a standard normal distribution table or calculator to find the probability of obtaining a z-score as extreme as -3.38 or less. The probability is approximately 0.0004, or 0.04%.
In other words, we have strong evidence to suggest that the population means is not equal to zero, and we can be 95% confident that the true population means falls within a certain range of values (based on the confidence interval).
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Which of the following is equivalent
1. 6(a+2)
2. 6a+12
3. 3(2a+4)
A rectangle has a perimeter.of 60 m. Find
the length of the rectangle if its breadth is:
10 m
Answer: 10 M
Step-by-step explanation:
please answer the screenshot question
Answer:
[tex]m\angle C\approx42.774^\circ[/tex]
Step-by-step explanation:
Use the Law of Sines
[tex]\displaystyle \frac{\sin A}{a}=\frac{\sin B}{b}=\frac{\sin C}{c}\\ \\ \frac{\sin47^\circ}{28}=\frac{\sin C}{26}\\ \\ 26\sin47^\circ=28\sin C\\ \\C = \sin^{-1}\biggr(\frac{26\sin47^\circ}{28}\biggr)\\\\C\approx42.774^\circ[/tex]
Question 7 of 10
Alex purchased a 2010 model sedan for $24,000. The dealership offered him
a $199/month payment plan for 48 months, at the end of which the unpaid
balance will be due. If the interest rate is 6%, find the balloon payment due at
the end of 48 months.
OA. $19,726.27
OB. $18,153.21
O C. $15,000
OD. $14,448
The balloon payment due at the end of 48 months is approximately $19,726.27.
Answer choice (A) is the closest option.
What is the present value of an annuity?
Present value of an annuity is a financial concept that refers to the current value of a series of regular and equal payments or cash flows to be received or paid out in the future.
To find the balloon payment due at the end of 48 months, we can use the formula for the present value of an annuity:
PV = PMT x ((1 - (1 + r)^-n) / r)
where PV is the present value of the annuity (i.e. the balloon payment), PMT is the monthly payment, r is the interest rate per month (i.e. 6% / 12 = 0.005), and n is the number of periods (i.e. 48).
We can first find the total amount paid over 48 months:
Total payments = $199/month x 48 months = $9,552
We can then find the remaining balance on the car after 48 months:
Remaining balance = $24,000 - $9,552 = $14,448
Finally, we can use the present value formula to find the balloon payment:
PV = $199 x ((1 - (1 + 0.005)^-48) / 0.005) + $14,448
PV ≈ $19,726.27
Hence, the balloon payment due at the end of 48 months is approximately $19,726.27.
Answer choice (A) is the closest option.
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Answer: I got u ma
Step-by-step explanation:
The cylindrical part of an architectural column has a height of 325 cm and a
diameter of 30 cm. Find the volume of the cylindrical part of the column. Use
3.14 for 7 and round your answer to the nearest cubic centimeter if needed.
325 cm
30 cm
OA. 76,538 cm³
OB. 918,450 cm³
OC. 229,613 cm³
OD. 73,125 cm³
Answer:
30/2 = 15cm = r
(Pi)r^2 = area of circle
(Pi)(15)^2 =706.5cm
Area of circle x height = volume
706.5 x 325 = 229613cm^3
Adam ran 2/5 mile. Julie ran 3/8 mile. How many more feet did Adam run more than Julie ( A mile is 5780 feet)
114.9 feet did Adam run more than Julie.
What is Equation?Two or more expressions with an Equal sign is called as Equation.
To compare the distances run by Adam and Julie, we need to convert both distances to feet.
Given Adam ran 2/5 mile and Julie ran 3/8 mile.
2/5 of a mile is equal to 2/5 * 5780 = 2312.4 feet
3/8 of a mile is equal to 3/8 × 5780 = 2167.5 feet.
Now let us find the difference between two persons.
So, Adam ran 2312.4 - 2167.5 = 114.9 feet.
Hence, 114.9 feet did Adam run more than Julie.
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Urgent: Pls help we find the right answer:(
The best description for this distribution is bimodal.
What is the Bimodal ?
Bimodal is a term used in statistics to describe a distribution with two modes, or peaks, in the frequency of occurrence of the values.
The distribution of the values: 3, 3, 5, 4, 3, 2, 5, 6, 5, 1 is best described as:
c. Bimodal
Bimodal means that the distribution has two modes, or peaks, in the frequency of occurrence of the values. In this case, the values 3 and 5 both have a high frequency of occurrence, forming two distinct modes in the distribution.
Therefore, the best description for this distribution is bimodal.
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20 points for brainliest answer
The rate of inflation for potatoes was 21%, for oranges it was 40%, and for ground beef it was 67%.
What do you mean by rate?In mathematics, rate is a concept used to describe the change in one quantity with respect to another. It is usually represented as a fraction or a ratio and can be thought of as a measure of how fast one quantity is changing with respect to another.
For example, the rate of change of position with respect to time is called velocity. The rate of change of velocity with respect to time is called acceleration. Similarly, the rate of change of any function with respect to its independent variable is called the derivative of the function, and it represents the instantaneous rate of change at a given point.
Rate can also be used to describe the relationship between two quantities that are changing at the same time. For example, in economics, the interest rate is the ratio of the amount of interest earned or paid to the amount of money invested or borrowed. In science, the rate of a chemical reaction is the change in the concentration of a reactant or a product over time.
The rate of inflation for each item can be calculated using the formula:
r = (P2/P1)¹/ⁿ - 1
where P1 is the price per pound in 2009 and P2 is the price per pound in the given year, and n is the number of years between the two prices (in this case, n = 1 year).
For Potatoes:
P1 = $0.620
P2 = $0.749
n = 1
r = (0.749/0.620)¹/¹ - 1 = 0.21 or 21%
For Oranges:
P1 = $0.910
P2 = $1.280
n = 1
r = (1.280/0.910)¹/¹ - 1 = 0.40 or 40%
For Ground beef:
P1 = $2.251
P2 = $3.775
n = 1
r = (3.775/2.251)¹/¹ - 1 = 0.67 or 67%
So, the rate of inflation for potatoes was 21%, for oranges it was 40%, and for ground beef it was 67%.
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Please help meee
Mr larson only wears his kilts on days he doestn ride his motorcycle. He owns 12 kilts and 10 motorcycles. He randomly picks one each day and returns it when he gets home. If you bumped into mr larson on Monday and Tuesday what is the percent probability that he was riding his motorcycle on both days?
Yall im crying help meee
On solving the provided question, we can say that there is a probability 20.66% chance that Mr. Larson rode his motorbike on both Monday and Tuesday.
What is probability?Probability theory is an area of mathematics that calculates the likelihood of an occurrence or a proposition being true. A risk is a number in the range of 0 and 1, whereas 1 implies certainty and a probability of roughly 0 indicates how likely an event seems to be to occur. Probability is a mathematical expression of the chance or chances that a given event will occur. Probabilities can alternatively be stated as integers between 0 and 1 or as % from 0% to 100%. the ratio of occurrences among equally likely choices that result in a certain event in comparison to all other outcomes.
Assuming that his decisions for the two days are independent, we must multiply the chance that he rides his motorbike on Monday by the probability that he rides it on Tuesday in order to get the likelihood that he does so on both Monday and Tuesday. Considering that his decisions on the two days are separate, Hence, the likelihood is:
(10/22) x (10/22) = 100/484 = 0.2066 or 20.66%
Hence, there is a roughly 20.66% chance that Mr. Larson rode his motorbike on both Monday and Tuesday.
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Which expression calculates the time in hours a person takes to walk 35 miles at a speed of 5 miles/hour
35 miles
5 miles
(Hint: 5x =35)
1/1 Pt
7
hours
1 hour
circle which one we are using
or
D Time=
35 miles
S
5 miles/ hour
miles or hours???
An expression that calculates the time in hours a person takes to walk 35 miles at a speed of 5 miles/hour is: T = 35/5 = 7 hours.
What is speed?In Mathematics, speed is the distance covered by a physical object per unit of time. This ultimately implies that, speed can be measured by using the following unit of measurement;
Meter per seconds (m/s).Miles per hour (mph).Kilometers per hour (kph).How to calculate the speed?Mathematically, the speed of any a physical object can be calculated by using this formula;
Speed = distance/time
Making time the subject of formula, we have:
Time = distance/speed
Time = 35/5
Time = 7 hours.
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Determine, whether each set of measures can be the sides of a right triangle.
1) 3,4,5
2) 5,5,10
3) 8,12,13
4) 26,24,10
Side 1/10 original length what fraction of the original surface area is the new surface area
The fraction of the original surface area to the new surface area is 1/100.
How to find the fraction of the original surface area to the new surface area?The scale factor is the size by which the shape is enlarged or reduced. It is used to increase the size of shapes like circles, triangles, squares, rectangles, etc.
Since the ratio of the new side to original length is 1/10.
Thus, the fraction of the original surface area to the new surface area will be the square of the ratio of the length. That is:
fraction of length = new length/ original = 1/10
fraction of area = (1/10)² = 1/100
fraction of area = new area/original area
1/100 = new area/original area
new area = 1/100 * original area
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Eighth grade V.3 Area and perimeter: word problems 6MY
You have
A
Keith has a tent that is 3 feet wide by 8 feet long. Keith wants to buy a plastic tarp to go
under the tent. The tarps are sold for $1.00 per square foot. How much would it cost to buy a
tarp that is the same size as Keith's tent?
Submit
The total cost to purchase a tarp that is the same size as Keith's tent is given as follows:
$24.
How to obtain the area of a rectangle?The area of a rectangle is given by the multiplication of the width and the length of the triangle, as follows:
A = lw.
The dimensions for the tarp in this problem are given as follows:
Width of 3 feet.Length of 8 feet.Hence the area is given as follows:
A = 3 x 8 = 24 square feet.
As the cost is $1.00 per square feet and there are 24 square feet, the total cost is given as follows:
$24.00.
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Sara went on a holiday for 20 days. It rained on a quarter of the days. On how many days did it rain?
Step-by-step explanation
So you need to find a quarter of 20. A quarter is equal to 1/4. So to find that take 20 and decide by 4.
So
20/4 = 5
So 5 days it rained
Which individual is eligible to use a 1040EZ form when filing a federal income
tax return?
A. Married person filing separately
B. Single person, with two dependents
C. Head of a household
D. Single person, with no dependents, who made $49,000 last year
Answer: A person who is eligible to use a 1040EZ form when filing a federal income tax return must meet certain criteria:
Must have taxable income of less than $100,000
Must not claim any dependents
Must only have wages, salaries, tips, taxable scholarship or fellowship grants, unemployment compensation, or Alaska Permanent Fund dividends, and your taxable interest is less than $1,500
Given these criteria, the correct answer is:
D. Single person, with no dependents, who made $49,000 last year.
Step-by-step explanation:
What’s 27/162 reduced to lowest terms?
Hi. Please help me. A cone has a volume of 350 cubic meters. The area base is 70 square meters. What is the height of the cone?
Answer:
Tha answer to your question is 15m
Step-by-step explanation:
pi * r^2 * h / 3
Area of the base = pi*r^2 = 70 so...
350 = 70 * h / 3
350 = (70/3) * h multiply both sides by 3/70
350 (3/70) = h = 15 m
Hope this helps you
Answer:
15m
Step-by-step explanation:
Using Fomula- V=AB h/3
h= 3 V/AB= 3· 350/70= 15m
I’m not sure how to answer these questions can someone help
Step-by-step explanation:
14/16 = 7/8
3/12 = 1/4
16/28 = 4/7
can someone tell me how to find last three parts?
The population in the year 2000 is 1230 students.
The equation for the population, P, of the school t years after 2000 is P = 53t + 1389.
The population of the school in 2015 in 2025 students
How to find the population in the year 2000?The starting population in 2003 is 1389.
average population growth per year = 53
The population in the year 2000 will be:
number of year = 2000 - 2003 = -3 (3 years back)
population in the year 2000 = 1389 -3(53) = 1230
To find an equation for the population, P, of the school t years after 2000. We can write:
P = 53t + 1389
Using your equation, predict the population of the school in 2015:
t = 2015 - 2003 = 12
P = 53t + 1389
P = 53(12) + 1389
P = 2025 students
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Given the proportion a/b = 8/15, what ratio completes the equivalent proportion a/b
The ratio completes the equivalent proportion a/b is 16/30.
What is a proportional relationship?Proportional relationships are relationships between two variables where their ratios are equivalent. Another way to think about them is that, in a proportional relationship, one variable is always a constant value times the other. That constant is known as the "constant of proportionality".
The given proportion is a/b = 8/15.
To get the equivalent proportion multiply both the numerator and denominator by 2 we get
16/30
Multiply both the numerator and denominator by 3 we get
24/45
Therefore, the ratio completes the equivalent proportion a/b is 16/30.
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