In this particular study, Selection bias, Response bias, non response bias and Self-selection bias may exist.
There are several biases that may exist in the study:
1. Selection bias: By only calling people whose names were randomly sampled from the phone book, the study may not accurately represent the population of the state as a whole. Mobile phones and unlisted numbers, which may represent a significant portion of the population, are not included in phone books and therefore not included in the sample.
2. Response bias: The study only includes people who answered the phone when the senator's office called. This means that the sample only represents people who were available and willing to participate in the study. People who were not available or unwilling to participate may have different opinions, which would introduce a response bias.
3. Nonresponse bias: People who did not answer the phone when the senator's office called may have different opinions than those who answered. This nonresponse bias can result in an overestimation or underestimation of the true population values.
4. Self-selection bias: By only calling people who answered the phone, the study may only represent those who are interested in politics or are more likely to participate in political surveys. This self-selection bias can result in an overestimation or underestimation of the true population values.
These biases can lead to inaccurate results and conclusions. To reduce these biases, it's important to use a representative sample of the population and to make sure that the sample is selected in a way that minimizes bias
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20 points if you help!
An equation of the line that passes through the given point and is perpendicular to the line shown in the graph are:
11. y = 5x - 1
12. y = 5x + 6
13. y = 5x + 23
14. y = 5x − 18
What is perpendicular line?If two geometric objects in fundamental geometry intersect at a right angle, they are perpendicular. The perpendicularity condition is graphically represented by the perpendicular symbol (║). It can be defined between two lines, between a line and a plane, or between two planes.
The slope of the line in graph
m = (3 -(-2))/(-2 - - 1)
m = − 5
For perpendicular to the given line the slope is always opposite sign and reciprocal i.e.
m = 3/5
11. (1, 4)
y - 4= 5(x - 1)
y - 4= 5x - 5 +4
y = 5x - 1
12. (0, 6)
y - 6 = 5(x - 0)
y = 5x + 6
13. (-5, -2)
y - (-2) = 5(x - (-5))
y = 5x + 23
14. (3, -3)
y - (-3) = 5(x - 3)
y = 5x − 18
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the sum of six and x is at least 20
5 tractors with the same power working together had not yet mowed 60% of the field when 3 of them left the job. How many hours did the other 2 tractors continue to work to finish harvesting the field, if it is known that exactly 0 of the field had been mowed after 6 hours 0,6
The information given is not sufficient to solve for the number of hours the remaining 2 tractors worked to finish harvesting the field.
How to solve similar problems with complete informationTo solve for this, additional information is required such as the mowing speed of each tractor, the size of the field, and the amount of the field that was mowed before the 3 tractors left the job.
With this information, you can determine the total mowing time required to mow the entire field, and then subtract the 6 hours the 5 tractors worked together to find the time the remaining 2 tractors worked.
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Janet is thinking of a two-digit positive whole number. It can be found by using n>56−22 , where n stands for Janet's number.
What are 3 numbers that could be Janet's number?
Explain why those numbers are possible
The numbers that are possible for Janet's number are 335, 36, and 37.
We start by finding the value of n using the equation n > 56 - 22. Solving this equation, we get n > 34.
So, Janet's number must be greater than 34, and it must be a two-digit positive whole number. Based on this, we can conclude that the following numbers are possible for Janet's number:
1. 35
2. 36
3. 37
These numbers are possible because they meet the criteria of being two-digit positive whole numbers and greater than 34.
Hence, the required three numbers are 35, 36, and 37.
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Hank bought a 4 room home for a rental, he put 20% down on the $300,00. 00 rental unit. How much will he be able to depreciate?
If Hank bought a 4 room home for a rental, and he put 20% down on the $300,00. 00 rental unit, the annual depreciation amount would be $8,727.27 .
To determine the depreciation amount, we first need to determine the depreciable basis of the rental property. The depreciable basis is the portion of the property's value that can be depreciated over time.
In this case, Hank put 20% down on a $300,000 rental unit, which means he paid $60,000 as a down payment. Therefore, the depreciable basis of the rental property is the remaining $240,000 ($300,000 - $60,000).
The IRS allows rental property owners to depreciate the depreciable basis of their property over 27.5 years using the straight-line method. To calculate the annual depreciation amount, we divide the depreciable basis by the number of years of useful life.
So, in this case, the annual depreciation amount would be $8,727.27 ($240,000 / 27.5). This means that Hank would be able to deduct $8,727.27 from his rental income each year for 27.5 years to account for the wear and tear of the property.
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The reduction of the fraction is (y-3)/4.
How to interpret the fraction?Suppose the fraction is proper (the numerator is smaller than the denominator).
Let it be [tex]\dfrac{a}{b}[/tex]
Then, we can interpret it as:
[tex]\dfrac{a}{b}[/tex]= a parts out of b parts of a thing.
There is a fraction, containing numerator(upper value) and denominator(lower value).
When the numerator is less than the denominator, the fraction is called proper fraction, otherwise it is called improper fraction.
A proper fraction is also called fraction which is less than 1.
And an improper fraction is ≥ 1
A mixed fraction contains a sum of whole number and a proper fraction.
Given;
=y^2-9/4y+12
=y^2-3^2/4(y+3)
=(y+3)(y-3)/4(y+3)
=y-3/4
Therefor, the answer of fraction will be (y-3)/4
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what is the reflection of the point (-8,7) across the x and y axis?
Step-by-step explanation:
We have the point (-8, 7)
When we reflect across the X-AXIS, then the Y coordinate changes signs
When we reflect across the Y-AXIS, then the X coordinate changes signs
So when we reflect (-8, 7) across the x-axis, it becomes (-8, -7) since we change signs for the Y coordinate from +7 to -7
Reflecting across the Y, it becomes (8, 7), because we change signs from -8 to +8
systems of two equations to solve systems of three equations.
Students are baking shortbread, croissants, and pound cakes.
• One group of students used a total of 3,525 grams of flour to make
5 batches of shortbread, 4 pound cakes, and 2 batches of croissants.
• Another group of students used 1,020 grams of flour to make one
batch each of shortbread and croissants and one pound cake.
• There is the same amount of flour in 4 pound cakes as there is
in 2 batches of croissants.
1. Let s = the amount of flour in a batch of shortbread, let c = the
amount of flour in a batch of croissants, and let p = the amount
of flour in a pound cake. Write an equation for each of the
3 statements above.
2. Multiply one equation, then add or subtract it with another
equation you wrote in Exercise 1 to eliminate the variable p.
3. Use the third equation and your result from Exercise 2 to write a
system of two equations with the variables p and c. Solve your system
and find the values for p and c.
4. What is the value of s? Explain what you did.
Step-by-step explanation:
Let s = the amount of flour in a batch of shortbread, let c = the amount of flour in a batch of croissants, and let p = the amount of flour in a pound cake.
The first statement can be written as 5s + 4p + 2c = 3525.
The second statement can be written as s + c + p = 1020.
The third statement can be written as 4p = 2c.
Multiplying the third equation by 2, we get 8p = 4c.
Subtracting this from the first equation, we get 5s + 4p + 2c - 8p = 3525 - 8p.
Simplifying, we get 5s - 6c = 3525 - 8p.
Now we have a system of two equations with the variables c and p:
5s - 6c = 3525 - 8p
s + c + p = 1020
We can use substitution to eliminate c. Solving the second equation for c, we get c = 1020 - s - p.
Substituting this into the first equation, we get 5s - 6(1020 - s - p) = 3525 - 8p.
Expanding the second equation and simplifying, we get 11s = 4545 - 8p.
Solving for s, we get s = (4545 - 8p) / 11.
Substituting the value of s into the second equation, we get c + p + (4545 - 8p) / 11 = 1020.
Expanding and simplifying, we get c + p + (4545 - 8p) / 11 = 1020.
Expanding, we get c + p = 1020 - (4545 - 8p) / 11.
Solving for c and p, we find that c = 664 grams and p = 356 grams.
Finally, the value of s is (4545 - 8 * 356) / 11 = 735 grams.
answer for the cost of a long-distance call to a certain city is $1.05 for the first minute and $0.15 for each additional minute or part thereof. what is the cost of a 15-minute call to this city?
The cost of a 15-minute call to this city would be $2.00.
The cost of a long-distance call to a certain city is typically $1.05 for the first minute and $0.15 for each additional minute or part thereof. This means that for each minute of the call, you will be charged $0.15 in addition to the first minute's charge. Therefore, for a 15-minute call to this city, you will be charged $1.05 for the first minute and 14 x $0.15 for the additional minutes, which comes to a total of $2.00. This price may vary depending on the phone carrier, but it is typically the same across the board. It is important to keep in mind that long-distance calls can become quite expensive, so it is important to be mindful of how much time you are spending on the phone.
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Negative sixteen plus the quotient of a number and 2 is 35.
If negative sixteen plus the quotient of a number and 2 is 35, the number is 102.
What is an expression?An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.
Example: 2 + 3x + 4y = 7 is an expression.
We have,
Number = x
Negative sixteen plus the quotient of a number and 2 is 35.
This can be written as,
Quotient of a number and 2.
x ÷ 2 = M (quotient)
So,
-16 + M = 35
Now,
Solve for M.
M = 35 + 16
M = 51
Now,
x ÷ 2 = 51
x/2 = 51
x = 51 x 2
x = 102
Now,
We can cross-check.
-16 + 51 = 35
35 = 35
Thus,
The number is 102.
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Solve the system of linear equations by substitution.
y=4x
x+y=-10
We may determine that the values of x and y are -2 and -8, respectively, by replacing the linear equations.
What are linear equations?
A linear equation is a first-order (linear) term and a constant in an algebraic equation of the type y=mx+b, where m is the slope and b is the y-intercept.
The previous equation, which has the variables y and x, is sometimes referred to as a "linear equation with two variables."
The typical form for linear equations with two variables is Ax+By=C.
For instance, the linear equation 2x+3y=5 is in standard form.
Finding both intercepts of an equation in this style is quite easy (x and y).
The following is the equation:
y=4x ...(1)
x+y=-10 ...(2)
Now change equation (2) to y = 4x:
x+y=-10
x+4x=-10
5x = -10
x = -10/5
x = -2
Then, change equation (1) to read x = -2:
y = 4x
y = 4(-2)
y = -8
Therefore, we may determine that the values of x and y are -2 and -8, respectively, by replacing the linear equations.
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d=1/8t
t = time
d = distance
If d = 1/8t and t is a time and d is a distance then in this expression 1/8 is representing speed of the object.
What is the relation between time, distance & speed ?The distance covered by the object is equal to the product of the speed at which the object is moving and time taken for covering the distance.
Distance = Time × Speed
Given that,
The expression,
d = 1/8t
where,
t = time
d = distance
which parameter 1/8 is indicating ?
The equation d = 1/8t describes a function that relates time (t) and distance (d) traveled.
The parameter 1/8 in the expression d = 1/8t is the rate of change of distance with respect to time.
It represents the amount of distance traveled in one unit of time.
In this case, 1/8 is the speed or velocity of the object being considered. It tells us that for every unit of time that passes, the distance traveled by the object increases by 1/8 units.
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A cubic root function has a domain of x≥−5 and a range of y≥2.
what is the domain if its inverse ?
Answer:
domain: x ≥ 2
Step-by-step explanation:
Given a function with domain x ≥ -5 and range y ≥ 2, you want the domain of its inverse.
DomainThe domain of an inverse function is the same as the range of the function.
The domain is x ≥ 2.
__
Additional comment
If a function tells you ...
y = f(x)
The inverse function is ...
x = f(y) ⇒ y = f⁻¹(x)
The domain and range of the inverse function are swapped from those of the original function.
Hasan plans to choose a book from a section of the store where everything is 25% off. He writes the expression d−0.25d to find the sale price of the book if the original price is d dollars.
Bella correctly writes another expression, 0.75d, that will also find the sale price of the book if the original price is d dollars.
Drag each description to explain each part of both expressions.
Dragging each description to explain each part of Hasan's and Bella's expressions is as follows:
Hassan's Expression of d - 0.25d:d = Original price of book
0.25 = Percent Discount
0.25d = Amount of Discount
d - 0.25d = Sale price of book
Bella's Expression of 0.75d:0.75 = Percent of original price Bella will pay
d = original price
0.75d = Sale price of book
What is an algebraic expression?An algebraic expression is a combination of variables, constants, numbers, and values using the mathematical operands, including addition (+), subtraction (-), division (÷), and multiplication (×).
An algebraic expression does not have the equal symbol (=) unlike an equation.
Thus, the correct descriptions has been dragged to each part of both Hasan's and Bella's expressions.
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On the coordinate plan below, what is the length of AB?
Which of the following options have the same value as 80 , percent of 22
Answer:: 80% of 22 is 16.
Answer:
80% of 22 is 16. Hope I helped you!!
Point A is at (-4, 8) and point B is at (6, 7).
What is the midpoint of line segment AB?
Answer:(1,7.5)
Step-by-step explanation:
Use Midpoint Formula
I’m on 1685 randomly selected high school students surveyed by public health organization, 437 said they were current smokers. Complete parts a through C below.
Answer: a. What is the proportion of current smokers among the 1685 high school students surveyed?
The proportion of current smokers among the 1685 high school students surveyed is 437/1685 = 0.259 or 26%.
b. What is the point estimate for the population proportion of all high school students who smoke?
The point estimate for the population proportion of all high school students who smoke is 0.259.
c. What is the 95% confidence interval for the population proportion of all high school students who smoke?
The 95% confidence interval can be calculated using the formula:
point estimate ± 1.96 * standard error
where standard error = square root of (point estimate * (1 - point estimate) / sample size)
standard error = square root of (0.259 * (1 - 0.259) / 1685) = 0.012
95% confidence interval = 0.259 ± 1.96 * 0.012
= 0.259 ± 0.023
= [0.236, 0.282]
So, the 95% confidence interval for the population proportion of all high school students who smoke is between 23.6% and 28.2%.
Step-by-step explanation:
If the graph of f(x) = 4* is shifted 6 units up, then what would be the equation of the new graph?
Og(x) = 4* - 6
Og(x) = 6(4)
Og(x) = -6(4)
Og(x) = 4x + 6
Complete the table using the function m = a + 20.
Answer:
26
28
29
Step-by-step explanation:
[tex]m = a + 20[/tex]
Anywhere you see the letter a, you'll plug in the given a number.
The first one is 6, meaning
[tex]m = 6 + 20 = 26[/tex]
Then we do the same for the others.
Point R is located at ( 3, 1) and point S is located at ( 3, -6). What is the distance between points R and S?
Group of answer choices
7 units
9 units
3 units
5 units
The distance between point R(3, 1) and S(3, -6) is 7 units
What is an equation?An equation is an expression that shows the relationship between two or more numbers and variables using mathematical operations. An equation can be linear, quadratic, cubic and so on, depending on the degree of the variable.
The distance between two points A(x₁, y₁) and B(x₂, y₂) on the coordinate plane is:
[tex]AB=\sqrt{(y_2-y_1)^2+(x_2-x_1)^2}[/tex]
Point R is located at ( 3, 1) and point S is located at ( 3, -6). Hence:
[tex]RS=\sqrt{(-6-1)^2+(3-3)^2}=7\ units[/tex]
The distance between point R and S is 7 units
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Answer:
7 unitsStep-by-step explanation:
just count down which gives you 7
If you flip a coin 12 times, what is the best prediction possible for the number of times it will land on heads?
The best prediction that the coin would land on heads wold be 6
If you flip a coin 12 times, what is the best prediction possible for the number of times it will land on heads?If you flip a fair coin 12 times, the best prediction for the number of times it will land on heads is 6. This is because each flip has an equal chance of landing on heads or tails, and if you flip a fair coin 12 times, the expected number of heads is 6. This is because each flip has a 50% chance of landing on heads.
In the coin, there are going to be 6 changes foe head and also 6 chains for tails. This is a 50 50 chance
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[tex]\lim_{x \to } 0 \frac{1-cosx\sqrt{cos2x} }{x^2} }[/tex]
Find the limit.
The limit of the function in this problem is given as follows:
lim x->0 f(x) = 1/2.
How to obtain the limit of the function?Following the standard procedure to obtain the limit of the function, merely obtaining the numeric value at x = 1, the limit is undetermined at x = 0, as follows:
0/0.
Hence the can apply the L'Hospital Rule, trying to find the derivative at the numerator and the denominator, hence:
[cos(x)sqrt(cos(2x))]' = [-sin(x)sqrt(cos(2x)) - 2sin(2x)cos(x)/sqrt(sin(2x))].[x²]' = 2x.At x = 0, the limit would again assume an undetermined value of 0/0, hence the L'Hospital Rule is applied again, hence:
[-sin(x)sqrt(cos(2x)) - 2sin(2x)cos(x)/sqrt(sin(2x))]' = cos(2x)sqrt(cos(2x)).[2x]' = 2.Now the function is:
f(x) = cos(2x)sqrt(cos(2x))/2.
Since cos(x) = 0, the numeric value at x = 0 is given as follows:
f(0) = 1/2.
Which is the limit.
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if sammy has 900 fish and 200 dies and then he gets 500 × 8090 and gets divided by 2 how many fish dose sammy have
On solving the provided question, we can say that Sammy has 900 fish and 200 dies and equation will be => x - y = 700
What is equation?A mathematical equation is a formula that joins two statements and uses the equal symbol (=) to indicate equality. A mathematical statement that establishes the equality of two mathematical expressions is known as an equation in algebra. For instance, in the equation 3x + 5 = 14, the equal sign places the variables 3x + 5 and 14 apart. The relationship between the two sentences on either side of a letter is described by a mathematical formula. Often, there is only one variable, which also serves as the symbol. for instance, 2x – 4 = 2.
Sammy has 900 fish and 200 dies
equation will be
x - y = 700
x = alive fishes
y = died fishes
remaining fishes are 700
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imagine you have a dataset at the individual level that reports how much tv an individual watches per week. you want to combine this with a dataset (also at the individual level) that reports how much each individual sleeps per week. what command in stata would be the most useful
The command in Stata would be the most useful is reg when you want to combine this with a dataset that reports how much each individual sleeps per week.
A collection of data is known as a data set (or dataset). In the case of tabular data, a data set relates to one or more database tables, where each row refers to a specific record in the corresponding data set and each column to a specific variable. The data set includes values for each of the variables, such as the object's height and weight, for each set member. Data sets may also include a group of files or documents.
For data management, visualisation, statistics, and automated reporting, Stata is a general-purpose statistical software programme created by StataCorp. Researchers in a variety of disciplines, such as science, biomedicine, epidemiology, and sociology, use it.
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What is the sign of
39
11
13
+
(
−
41
1
13
)
39
13
11
+(−41
13
1
)39, start fraction, 11, divided by, 13, end fraction, plus, left parenthesis, minus, 41, start fraction, 1, divided by, 13, end fraction, right parenthesis?
The sign of the expression is positive, since the result is positive.
What do you mean by algebraic expression?An algebraic expression is a mathematical phrase that can contain numbers, variables, and operations. Algebraic expressions are used to represent mathematical relationships and can be simplified, evaluated, and solved for particular values of the variables.
Algebraic expressions can be simple, such as a single variable or number, or complex, involving multiple variables, operations, and grouping symbols, such as parentheses. For example, the expression "x + 2" is a simple algebraic expression, where "x" is the variable and "2" is the constant term.
In algebra, variables are used to represent unknown values and the goal is often to find the value of these variables that satisfy a given condition or equation. Algebraic expressions can be simplified by combining like terms and applying the properties of arithmetic operations.
Algebraic expressions are also used to represent mathematical functions. A function is a relationship between an input value and an output value, where each input value corresponds to exactly one output value. Algebraic expressions can be used to define a function, and can also be used to find the value of the function for a particular input.
The expression 39 11 13 +(−41 131 )39, 11/13 + (−41/13) simplifies to 39 11 13 +(−41 131 )39, 11/13 + (−41/13) = 39 11 13 - 41 131 = (39 × 13 - 41 × 11) / 13 = (507 - 451) / 13 = 56 / 13 = 4.
The sign of the expression is positive, since the result is positive.
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Find the midpoint of A and B
where A has coordinates (2, 7)
and B has coordinates (6, 3).
Answer:
(4, 5)
Step-by-step explanation:
Add the two x values and divide by two, add the two y values and divide by two. Then put them in brackets and those are your coordinates.
Enlarge triangle T by a scale factor 1/2, centre (2, 0).
Answer:
To enlarge a triangle by a scale factor of 1/2 with the center (2, 0), each vertex of the triangle should be multiplied by 1/2 and then shifted so that the center of the new triangle is (2, 0).
Step-by-step explanation:
For example, if the original triangle has vertices at (a, b), (c, d), and (e, f), the vertices of the new triangle would be at ((a-2)/2 + 2, (b-0)/2 + 0), ((c-2)/2 + 2, (d-0)/2 + 0), and ((e-2)/2 + 2, (f-0)/2 + 0).
Adobe mud can be poured into molds to make bricks. Each brick is a rectangular prism with a width 4 inches less than its length and a height 6 inches less than its length. Each mold holds 576 cubic inches of mud. What are the dimensions of the mold?
Answer: Let's call the length of the brick "l". Then, the width is "l - 4" and the height is "l - 6".
The volume of the brick can be expressed as:
V = l * (l - 4) * (l - 6)
Since each mold holds 576 cubic inches of mud, we can set the volume of the brick equal to 576 and solve for l:
l * (l - 4) * (l - 6) = 576
Expanding and simplifying the left side of the equation, we get:
l^3 - 10l^2 + 24l - 576 = 0
This is a cubic equation, and finding the exact value for l can be difficult. However, we can use numerical methods, such as the bisection method or Newton's method, to find an approximate value.
Step-by-step explanation:
I attached a photo please answer as quickly as possible.
The smallest integer value in the set is 7.
What is an integer?The grouping of positive and negative numbers is known as integers. Integers, like whole numbers, do not include the fractional portion. Integers can therefore be defined as numbers that can be positive, negative, or zero but not as fractions.
Since an integer is a whole number, it can reach both positive and negative infinity. 0 is the smallest non-negative number.
Consider the given term as -3(x-4) = 12
Then, -3x + 12 = 12
or, -3x = 0
or, x = 0
So, the value of x is either x > 0 or x < 0
Based on the given option, the smallest integer value is 7.
So, the required answer is 7.
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