Question 1

The Y-intercept is the value of   when X equals

Accepted Answer

A) 1.0 
B) 0.0 
C) F1F1F1S1F1F1F101.0 
D) 2.0 
A) 1.0 
B) 0.0 
C) F1F1F1S1F1F1F101.0 
D) 2.0 B

Question 2

The best-fitting line through a scatterplot is known as the ______ line.

Accepted Answer

A) scatterplot 
B) correlation 
C) variance 
D) regression 
A) scatterplot 
B) correlation 
C) variance 
D) regression D

Question 3

Compared to a strong relationship,a weak relationship between two variables results in

Accepted Answer

A) greater prediction error and a larger value of   . 
B) greater prediction error and a smaller value of   . 
C) less prediction error and a larger value of   . 
D) less prediction error and a smaller value of   . 
A) greater prediction error and a larger value of   . 
B) greater prediction error and a smaller value of   . 
C) less prediction error and a larger value of   . 
D) less prediction error and a smaller value of   . A

Question 4

Computing the standard error of the estimate (   )by subtracting each   from the corresponding Y,squaring the difference,summing the results,dividing by N,and then taking the square root (the defining formula)is difficult and time-consuming.Fortunately,the same value can be computed by multiplying the standard deviation of Y (i.e. ,   )by

Accepted Answer

A) 100 
B)    
C)    
D) 0.5 
A) 100 
B)    
C)    
D) 0.5

Question 5

What is the slope of the following regression equation?

Accepted Answer

A) 3.92 
B) F1F1F1S1F1F1F103.92 
C) 2.69 
D) 2.69X 
A) 3.92 
B) F1F1F1S1F1F1F103.92 
C) 2.69 
D) 2.69X

Question 6

The standard error of the estimate is similar to the

Accepted Answer

A) sum of the actual Y scores around their predicted YF1F1F1S1F1F1F10 scores. 
B) standard deviation of actual Y scores around their predicted YF1F1F1S1F1F1F10 scores. 
C) degree to which any predicted YF1F1F1S1F1F1F10 will deviate from its actual Y score. 
D) standard deviation of actual Y scores around their actual X scores. 
A) sum of the actual Y scores around their predicted YF1F1F1S1F1F1F10 scores. 
B) standard deviation of actual Y scores around their predicted YF1F1F1S1F1F1F10 scores. 
C) degree to which any predicted YF1F1F1S1F1F1F10 will deviate from its actual Y score. 
D) standard deviation of actual Y scores around their actual X scores.

Question 7

A nutrition major at State University was studying the relationship between carbohydrates (X)and calories (Y).For example,a serving of a particular brand of wheat pasta yielded 42 carbohydrates and 210 calories.After collecting X and Y data on many kinds of foods,the student determined the slope of the regression line to be 4.0 and the Y intercept to be 3.0.If a new food is tested,and the number of carbohydrates (X)is 100,what would be the predicted calories (   )?

Accepted Answer

A) 304 
B) 403 
C) 305 
D) 504 
A) 304 
B) 403 
C) 305 
D) 504

Question 8

In a study of the relationship between amount of sugar consumed (X)and excitability (Y)in children,the regression equation was calculated to be   .The amount of sugar consumed ranged from 1 to 4 ounces.Which of the following graphs correctly displays the regression line?

Accepted Answer

A) Graph A 
B) Graph B 
C) Graph C 
D) Graph D 
A) Graph A 
B) Graph B 
C) Graph C 
D) Graph D

Question 9

In the regression equation,the slope summarizes ______ and the Y-intercept indicates ______.

Accepted Answer

A) predictor variables;what the value of the criterion variable is 
B) the steepness and direction of the regression line;the value of   when X = 0 
C) the length of the regression line;the starting point of the regression line 
D) the starting point from which the Y scores begin to change as the X scores increase;the direction and rate in which Ys change as X increases 
A) predictor variables;what the value of the criterion variable is 
B) the steepness and direction of the regression line;the value of   when X = 0 
C) the length of the regression line;the starting point of the regression line 
D) the starting point from which the Y scores begin to change as the X scores increase;the direction and rate in which Ys change as X increases

Question 10

What is the Y-intercept of the following regression equation?   = -4.30X - 1.72

Accepted Answer

A) -1.72 
B) 1.72 
C) -4.30 
D) -4.30X 
A) -1.72 
B) 1.72 
C) -4.30 
D) -4.30X

Question 11

A regression line is used to obtain

Accepted Answer

A) the Y at each X. 
B) the X at each Y. 
C) the   at any X. 
D) the X at any   . 
A) the Y at each X. 
B) the X at each Y. 
C) the   at any X. 
D) the X at any   .

Question 12

Which of the following formulas represents the Y intercept of the regression line?

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 13

When we divide the error remaining after we use the relationship to predict Y scores (   )by the total error when we use the mean to predict the Y scores (   )and then subtract the result from 1,the final result is the

Accepted Answer

A) proportion of variance not accounted for. 
B) proportion of variance accounted for. 
C) standard error of the estimate. 
D) coefficient of alienation. 
A) proportion of variance not accounted for. 
B) proportion of variance accounted for. 
C) standard error of the estimate. 
D) coefficient of alienation.

Question 14

When r = 0.0,the value of   is equal to

Accepted Answer

A)    
B) 0 
C) 1.0 
D)    
A)    
B) 0 
C) 1.0 
D)

Question 15

To predict a   score from a given X score using the regression equation,we would

Accepted Answer

A) first multiply X by the slope and then add the Y-intercept. 
B) first multiply X by the Y-intercept and then add the slope. 
C) first add the Y-intercept to X and then multiply by the slope. 
D) first add the slope to X and then multiply by the Y-intercept. 
A) first multiply X by the slope and then add the Y-intercept. 
B) first multiply X by the Y-intercept and then add the slope. 
C) first add the Y-intercept to X and then multiply by the slope. 
D) first add the slope to X and then multiply by the Y-intercept.

Question 16

If there is no relationship between two variables,the slope of the regression line will equal

Accepted Answer

A) 1.0 
B) 0.5 
C) 0.0 
D) F1F1F1S1F1F1F101.0 
A) 1.0 
B) 0.5 
C) 0.0 
D) F1F1F1S1F1F1F101.0

Question 17

For the following data,what is the predicted test score for a person with a stress level of 10?

Accepted Answer

A) 0.76 
B) 20.93 
C) -7.16 
D) 12.43 
A) 0.76 
B) 20.93 
C) -7.16 
D) 12.43

Question 18

What is the Y-intercept of the following regression equation?

Accepted Answer

A) 0.56X 
B) 0.56 
C) 2.41 
D) X + 2.41 
A) 0.56X 
B) 0.56 
C) 2.41 
D) X + 2.41

Question 19

If the correlation coefficient turns out to be a relatively high value,then the value of   will be

Accepted Answer

A) relatively low. 
B) relatively high. 
C) unrelated to the value of r. 
D) low if r is positive and high if r is negative. 
A) relatively low. 
B) relatively high. 
C) unrelated to the value of r. 
D) low if r is positive and high if r is negative.

Question 20

The coefficient of determination is interpreted as the

Accepted Answer

A) amount of variance determined in all the Y scores. 
B) determined amount of variance in all the Y scores. 
C) degree to which the scores are efficient. 
D) proportion of variance accounted for. 
A) amount of variance determined in all the Y scores. 
B) determined amount of variance in all the Y scores. 
C) degree to which the scores are efficient. 
D) proportion of variance accounted for.

The Y-intercept is the value of when X equals

The best-fitting line through a scatterplot is known as the ______ line.

Compared to a strong relationship,a weak relationship between two variables results in

What is the slope of the following regression equation?

The standard error of the estimate is similar to the

In a study of the relationship between amount of sugar consumed (X)and excitability (Y)in children,the regression equation was calculated to be .The amount of sugar consumed ranged from 1 to 4 ounces.Which of the following graphs correctly displays the regression line?

In the regression equation,the slope summarizes and the Y-intercept indicates .

What is the Y-intercept of the following regression equation? = -4.30X - 1.72

A regression line is used to obtain

Which of the following formulas represents the Y intercept of the regression line?

When we divide the error remaining after we use the relationship to predict Y scores ( )by the total error when we use the mean to predict the Y scores ( )and then subtract the result from 1,the final result is the

When r = 0.0,the value of is equal to

To predict a score from a given X score using the regression equation,we would

If there is no relationship between two variables,the slope of the regression line will equal

For the following data,what is the predicted test score for a person with a stress level of 10?

What is the Y-intercept of the following regression equation?

If the correlation coefficient turns out to be a relatively high value,then the value of will be

The coefficient of determination is interpreted as the

Introduction to Statistics

Statistics and the Research Process

Frequency Distributions and Percentiles

Measures of Central Tendency;the Mean, median, and Mode

Measures of Variability: Range, variance, and Standard Deviation

Z-Scores and the Normal Curve

The Correlation Coefficient

Using Probability to Make Decisions About Data

Introduction to Hypothesis Testing

Performing the One-Sample T-Test and Testing Correlation Coefficients

The Two-Sample T-Test

The One-Way Analysis of Variance

The Two-Way Analysis of Variance

Chi Square and Other Nonparametric Procedures

Filters

Exam 8: Linear Regression

The Y-intercept is the value of when X equals

The best-fitting line through a scatterplot is known as the ______ line.

Compared to a strong relationship,a weak relationship between two variables results in

What is the slope of the following regression equation?

The standard error of the estimate is similar to the

In a study of the relationship between amount of sugar consumed (X)and excitability (Y)in children,the regression equation was calculated to be .The amount of sugar consumed ranged from 1 to 4 ounces.Which of the following graphs correctly displays the regression line?

In the regression equation,the slope summarizes ______ and the Y-intercept indicates ______.

What is the Y-intercept of the following regression equation? = -4.30X - 1.72

A regression line is used to obtain

Which of the following formulas represents the Y intercept of the regression line?

When we divide the error remaining after we use the relationship to predict Y scores ( )by the total error when we use the mean to predict the Y scores ( )and then subtract the result from 1,the final result is the

When r = 0.0,the value of is equal to

To predict a score from a given X score using the regression equation,we would

If there is no relationship between two variables,the slope of the regression line will equal

For the following data,what is the predicted test score for a person with a stress level of 10?

What is the Y-intercept of the following regression equation?

If the correlation coefficient turns out to be a relatively high value,then the value of will be

The coefficient of determination is interpreted as the

Introduction to Statistics

Statistics and the Research Process

Frequency Distributions and Percentiles

Measures of Central Tendency;the Mean, median, and Mode

Measures of Variability: Range, variance, and Standard Deviation

Z-Scores and the Normal Curve

The Correlation Coefficient

Using Probability to Make Decisions About Data

Introduction to Hypothesis Testing

Performing the One-Sample T-Test and Testing Correlation Coefficients

The Two-Sample T-Test

The One-Way Analysis of Variance

The Two-Way Analysis of Variance

Chi Square and Other Nonparametric Procedures

Filters

In the regression equation,the slope summarizes and the Y-intercept indicates .