Question 1

$$\text { If the correlation coefficient } r \text { is equal to } 0.566 , \text { find the coefficient of determination. }$$

Accepted Answer

A)  0.320 
B)  0.752 
C)  0.680 
D)  0.443 
A)  0.320 
B)  0.752 
C)  0.680 
D)  0.443 A

Question 2

In a study of reaction times, the time to respond to a visual stimulus $( x )$ and the time to respond to an auditory stimulus $( y )$ were recorded for each of 8 subjects. Times were measured in thousandths of a second. The results are presented in the following table.
$\begin{array}{cc}
\hline \text { Visual } & \text { Auditory } \
\hline 218 & 209 \
153 & 150 \
240 & 226 \
202 & 196 \
243 & 225 \
165 & 161 \
207 & 196 \
209 & 198 \
\hline
\end{array}$

Compute the least-squares regression line for predicting auditory response time $( y )$ from visual response time $( x )$.

Accepted Answer

A)  $y = 20.509336 x$ 
B)  $y = 20.509336 + 0.853345 x$ 
C)  $y = 0.853345 x$ 
D)  $y = 0.853345 + 20.509336 x$ 
A)  $y = 20.509336 x$ 
B)  $y = 20.509336 + 0.853345 x$ 
C)  $y = 0.853345 x$ 
D)  $y = 0.853345 + 20.509336 x$ B

Question 3

Total number of assists and the total number of points or a sample of NHL scoring leader: shown.
$\begin{array} { c c } \text { Assists } x & \text { Total Points } y \ 26 & 48 \ 29 & 68 \ 32 & 66 \ 34 & 69 \ 36 & 76 \ 37 & 67 \ 40 & 84 \end{array}$
Predict the total points if $x = 30$ assists.

Accepted Answer

A)  $y ^ { \prime } = 2.693$ points when $x = 30$ assists. 
B)  $y ^ { \prime } = 58.86$ points when $x = 30$ assists. 
C)  $y ^ { \prime } = 61.55$ points when $x = 30$ assists. 
D)  $y ^ { \prime } = 1.962$ points when $x = 30$ assists. 
A)  $y ^ { \prime } = 2.693$ points when $x = 30$ assists. 
B)  $y ^ { \prime } = 58.86$ points when $x = 30$ assists. 
C)  $y ^ { \prime } = 61.55$ points when $x = 30$ assists. 
D)  $y ^ { \prime } = 1.962$ points when $x = 30$ assists. C

Question 4

$$\text { A formula for the correlation coefficient } r \text { is }$$_____

Accepted Answer

The answer of \[\text { A formula for the correlation...

Question 5

An architect wants to determine the relationship between the height (in feet) and $n$ of stories in a building. The data for a sample of 10 buildings in Pittsburgh are sh
a. Draw the scatter plot for the variables.
b. Give a brief explanation of the type of relationship.
$\begin{array} { c c } \text { Stories } x & \text { Height } y \ 64 & 841 \ 54 & 725 \ 40 & 635 \ 31 & 616 \ 45 & 615 \ 38 & 582 \ 42 & 535 \ 41 & 520 \ 37 & 511 \ 40 & 485 \end{array}$

Accepted Answer

a)
@#IMG-DLM&

b) There appear

Question 6

In a study of reaction times, the time to respond to a visual stimulus $( x )$ and the time to respond to an auditory stimulus $( y )$ were recorded for each of 6 subjects. Times were measured in thousandths of a second. The results are presented in the following table.
The following MINITAB output describes the fit of a linear model to these data. Assume assumptions of the linear model are satisfied.
The regression equation is
Auditory $= 240.686515 + 0.109829$ Visual
$\begin{array} { l l l l l } \text { Predictor } & \text { Coef } & \text { SE Coef } & \text { T } & \text { P } \ \text { Constant } & 240.686515 & 14.271226 & 16.865161 & 0.000073 \ \text { Visual } & 0.109829 & 0.066275 & 1.657159 & 0.172829 \end{array}$
What is the intercept of the least-squares regression line?

Accepted Answer

A)  0.109829 
B)  0.066275 
C)  16.865161 
D)  240.686515 
A)  0.109829 
B)  0.066275 
C)  16.865161 
D)  240.686515

Question 7

$$\text { If the correlation coefficient } r \text { is equal to } 0.526 \text {, find the coefficient of nondetermination. }$$

Accepted Answer

A)  0.277 
B)  0.723 
C)  0.725 
D)  0.402 
A)  0.277 
B)  0.723 
C)  0.725 
D)  0.402

Question 8

The standard error of estimate can be used for constructing a(n) __________interval about a $y ^ { \prime }$ value.

Accepted Answer

The answer of The standard error of estimate can be...

Question 9

Daniel Wiseman, a scientist for Gres-Trans Corp., wants to determine if the flow rate of a particular material changes with different changes in temperature. The data is plotted in tl below. What type of relationship exists between the flow rate and the change in temperatı

Accepted Answer

A)  positive 
B)  There is no relationship. 
C)  curvilinear 
D)  negative 
A)  positive 
B)  There is no relationship. 
C)  curvilinear 
D)  negative

Question 10

The range of the correlation coefficient is from 0 to 1.

Accepted Answer

A) True 
 B)False

Question 11

A correlation coefficient of $0.961$ would mean that the values of $x$ increase as the values of $y$ decrease.

Accepted Answer

A) True 
 B)False

Question 12

If there is a strong negative linear relationship between the variables, the value of
will be close to -1.

Accepted Answer

The answer of If there is a strong negative linear...

Question 13

is a statistical method used to determine whether a relationship
between variables exists.

Accepted Answer

The answer of is a statistical method used to determine...

Question 14

What is the value of $y ^ { \prime }$ when $x = 3$, if the equation of the regression line is $y ^ { \prime } = 23.1 - 3.8 x$ ?

Accepted Answer

A)  11.7 
B)  4.73 
C)  5.29 
D)  34.5 
A)  11.7 
B)  4.73 
C)  5.29 
D)  34.5

Question 15

In a relationship, as one variable increases, the other variable
decreases, and vice versa.

Accepted Answer

The answer of In a relationship, as one variable increases,...

Question 16

$$\begin{array}{l}
\text { Compute the standard error of the estimate for the data below. Round to the thousandths } 1\
\begin{array} { c | c c c c c c } 
x & 27 & 28 & 29 & 30 & 31 & 32 \
\hline y & 116.95 & 120.37 & 125.26 & 124.90 & 129.37 & 130.90
\end{array}
\end{array}$$

Accepted Answer

A)  1.291 
B)  1.510 
C)  1.289 
D)  1.057 
A)  1.291 
B)  1.510 
C)  1.289 
D)  1.057

Question 17

The two variables in a scatter plot are called the

Accepted Answer

A)  independent variable and dependent variable. 
B)  lines and points. 
C)  spread and pattern. 
D)  relative frequency and relative proportion. 
A)  independent variable and dependent variable. 
B)  lines and points. 
C)  spread and pattern. 
D)  relative frequency and relative proportion.

Question 18

The director of an alumni association for a small college wants to determine whetl there is any type of relationship between the amount of an alumnus' contribution ( dollars) and the number of years the alumnus has been out of school. The data fol
a. Draw the scatter plot for the variables.
b. Give a brief explanation of the type of relationship.
$\begin{array} { c c } \text { Years } x & \text { Contribution } y \ 1 & 500 \ 5 & 100 \ 3 & 300 \ 10 & 50 \ 7 & 75 \ 6 & 80 \end{array}$

Accepted Answer

a)
@#IMG-DLM&

b) There appears to be a

Question 19

The standard error of the estimate is the standard deviation of the observed $x$-values about the predicted $x ^ { \prime }$ values.

Accepted Answer

A) True 
 B)False

Question 20

The prediction interval around $y ^ { \prime }$ for a specific $x$ is

Accepted Answer

A)  the interval of values of $x$ used to predict $y ^ { \prime }$. 
B)  the value of $y$ used to calculate the slope of the regression line. 
C)  a confidence interval for the true mean value of the $y$ values that correspond to that $x$. 
D)  the difference between the value of $y$ and the value of $x$. 
A)  the interval of values of $x$ used to predict $y ^ { \prime }$. 
B)  the value of $y$ used to calculate the slope of the regression line. 
C)  a confidence interval for the true mean value of the $y$ values that correspond to that $x$. 
D)  the difference between the value of $y$ and the value of $x$.

$\text { If the correlation coefficient } r \text { is equal to } 0.566 , \text { find the coefficient of determination. }$

Total number of assists and the total number of points or a sample of NHL scoring leader: shown. Assists x Total Points y 26 48 29 68 32 66 34 69 36 76 37 67 40 84 Predict the total points if $x = 30$ assists.

$\text { A formula for the correlation coefficient } r \text { is }$ _____

$\text { If the correlation coefficient } r \text { is equal to } 0.526 \text {, find the coefficient of nondetermination. }$

The standard error of estimate can be used for constructing a(n) __________interval about a $y ^ { \prime }$ value.

Daniel Wiseman, a scientist for Gres-Trans Corp., wants to determine if the flow rate of a particular material changes with different changes in temperature. The data is plotted in tl below. What type of relationship exists between the flow rate and the change in temperatı

The range of the correlation coefficient is from 0 to 1.

A correlation coefficient of $0.961$ would mean that the values of $x$ increase as the values of $y$ decrease.

If there is a strong negative linear relationship between the variables, the value of will be close to -1.

is a statistical method used to determine whether a relationship between variables exists.

What is the value of $y ^ { \prime }$ when $x = 3$ , if the equation of the regression line is $y ^ { \prime } = 23.1 - 3.8 x$ ?

In a relationship, as one variable increases, the other variable decreases, and vice versa.

Compute the standard error of the estimate for the data below. Round to the thousandths 1 x 27 28 29 30 31 32 y 116.95 120.37 125.26 124.90 129.37 130.90

The two variables in a scatter plot are called the

The standard error of the estimate is the standard deviation of the observed $x$ -values about the predicted $x ^ { \prime }$ values.

The prediction interval around $y ^ { \prime }$ for a specific $x$ is

The Nature of Probability and Statistics

Frequency Distributions and Graphs

Data Description

Probability and Counting Rules

Discrete Probability Distributions

The Normal Distribution

Confidence Intervals and Sample Size

Hypothesis Testing

Testing the Difference Between Two Means, Two Variances, and Two Proportions

Other Chi-Square Tests

Analysis of Variance

Nonparametric Statistics

Sampling and Simulation

Filters

Exam 10: Correlation and Regression

Total number of assists and the total number of points or a sample of NHL scoring leader: shown. Assists x Total Points y 26 48 29 68 32 66 34 69 36 76 37 67 40 84 Predict the total points if x=30x = 30x=30 assists.

A formula for the correlation coefficient r is \text { A formula for the correlation coefficient } r \text { is } A formula for the correlation coefficient r is _____

The standard error of estimate can be used for constructing a(n) __________interval about a y′y ^ { \prime }y′ value.

Daniel Wiseman, a scientist for Gres-Trans Corp., wants to determine if the flow rate of a particular material changes with different changes in temperature. The data is plotted in tl below. What type of relationship exists between the flow rate and the change in temperatı

The range of the correlation coefficient is from 0 to 1.

A correlation coefficient of 0.9610.9610.961 would mean that the values of xxx increase as the values of yyy decrease.

If there is a strong negative linear relationship between the variables, the value of will be close to -1.

is a statistical method used to determine whether a relationship between variables exists.

What is the value of y′y ^ { \prime }y′ when x=3x = 3x=3 , if the equation of the regression line is y′=23.1−3.8xy ^ { \prime } = 23.1 - 3.8 xy′=23.1−3.8x ?

In a relationship, as one variable increases, the other variable decreases, and vice versa.

Compute the standard error of the estimate for the data below. Round to the thousandths 1 x 27 28 29 30 31 32 y 116.95 120.37 125.26 124.90 129.37 130.90

The two variables in a scatter plot are called the

The standard error of the estimate is the standard deviation of the observed xxx -values about the predicted x′x ^ { \prime }x′ values.

The prediction interval around y′y ^ { \prime }y′ for a specific xxx is

The Nature of Probability and Statistics

Frequency Distributions and Graphs

Data Description

Probability and Counting Rules

Discrete Probability Distributions

The Normal Distribution

Confidence Intervals and Sample Size

Hypothesis Testing

Testing the Difference Between Two Means, Two Variances, and Two Proportions

Other Chi-Square Tests

Analysis of Variance

Nonparametric Statistics

Sampling and Simulation

Filters

Total number of assists and the total number of points or a sample of NHL scoring leader: shown. Assists x Total Points y 26 48 29 68 32 66 34 69 36 76 37 67 40 84 Predict the total points if $x = 30$ assists.

$\text { A formula for the correlation coefficient } r \text { is }$ _____

The standard error of estimate can be used for constructing a(n) __________interval about a $y ^ { \prime }$ value.

A correlation coefficient of $0.961$ would mean that the values of $x$ increase as the values of $y$ decrease.

What is the value of $y ^ { \prime }$ when $x = 3$ , if the equation of the regression line is $y ^ { \prime } = 23.1 - 3.8 x$ ?

The standard error of the estimate is the standard deviation of the observed $x$ -values about the predicted $x ^ { \prime }$ values.

The prediction interval around $y ^ { \prime }$ for a specific $x$ is