Question 1

If the regression line on a scattergram slopes upward from left to right,the relationship is

Accepted Answer

A) bivariate. 
B) strong. 
C) parallel. 
D) positive. 
A) bivariate. 
B) strong. 
C) parallel. 
D) positive.

Question 2

The Y intercept is the point where

Accepted Answer

A) the horizontal axis connects to the vertical axis. 
B) the regression line crosses the horizontal axis of the scattergram. 
C) the regression line meets the conditional mean of Y. 
D) the regression line crosses the vertical axis of the scattergram. 
A) the horizontal axis connects to the vertical axis. 
B) the regression line crosses the horizontal axis of the scattergram. 
C) the regression line meets the conditional mean of Y. 
D) the regression line crosses the vertical axis of the scattergram.

Question 3

For a sample of 15 rural counties in one state,a researcher has collected information about the rate of deaths due to traffic accidents per 1,000,000 population and the percentage of the population which consists of males,age 16 to 25.For these variables,find the least squares regression line and compute r and r squared.Write a sentence or two summarizing and explaining your results.
 $\begin{array}{|l|l|l|}
\hline & \text { RATE OF  } & \text { \% OF POPULATION } \
\hline \text { TOUNTY } & \text { TRAFFIC DEATHS } & \text { YOUNG MALES } \
\hline \mathrm{A} & 15 & 4 \
\hline \mathrm{B} & 16 & 5 \
\hline \mathrm{C} & 22 & 10 \
\hline \mathrm{D} & 23 & 9 \
\hline \mathrm{E} & 20 & 8 \
\hline \mathrm{F} & 25 & 11 \
\hline \mathrm{G} & 18 & 2 \
\hline \mathrm{H} & 15 & 6 \
\hline I& 19 & 12 \
\hline J&10 & 3 \
\hline K&9 & 2 \
\hline L&18 & 15 \
\hline M&15 & 9 \
\hline N& 24 & 16 \
\hline O&9 & 3 \
\hline
\end{array}$

Accepted Answer

Y = 10.88

Question 4

One key assumption of correlation analysis is that the variables have an essentially ____ relationship.

Accepted Answer

A) linear 
B) non-linear 
C) curvilinear 
D) circular 
A) linear 
B) non-linear 
C) curvilinear 
D) circular

Question 5

The coefficient of determination may be interpreted with a logic akin to

Accepted Answer

A) chi square. 
B) the standard deviation. 
C) PRE. 
D) bivariate tables. 
A) chi square. 
B) the standard deviation. 
C) PRE. 
D) bivariate tables.

Question 6

The explained variation represents

Accepted Answer

A) the conditional distributions of Y. 
B) the amount that Y varies. 
C) the improvement in our ability to predict Y when taking X into account. 
D) the sum of the squares of all scores of Y. 
A) the conditional distributions of Y. 
B) the amount that Y varies. 
C) the improvement in our ability to predict Y when taking X into account. 
D) the sum of the squares of all scores of Y.

Question 7

A researcher reports a Pearson r of .57 between gender (female = 0,males = 1) and involvement in juvenile delinquency.Which of the following is an appropriate interpretation?

Accepted Answer

A) females are more delinquent 
B) there is no relationship between the variables 
C) delinquency increases as gender "increases" 
D) only males were delinquent 
A) females are more delinquent 
B) there is no relationship between the variables 
C) delinquency increases as gender "increases" 
D) only males were delinquent

Question 8

When referring to interval-ratio variables,a commonly used synonym for association is

Accepted Answer

A) probability. 
B) predictability. 
C) correlation. 
D) causation. 
A) probability. 
B) predictability. 
C) correlation. 
D) causation.

Question 9

For summarizing the relationship between X and Y,the points of minimized variation for the conditional distributions of Y provide us with

Accepted Answer

A) several regression lines to choose from. 
B) the best fitting regression line. 
C) a regression line that touches all of the dots. 
D) regression lines with negative slopes. 
A) several regression lines to choose from. 
B) the best fitting regression line. 
C) a regression line that touches all of the dots. 
D) regression lines with negative slopes.

Question 10

A perfect association between variables can be seen on a scattergram when

Accepted Answer

A) all dots lie an equal distance from the regression line. 
B) all dots lie on the regression line. 
C) the regression line forms a right angle at its intersection with the X axis. 
D) the regression line is parallel to the X axis. 
A) all dots lie an equal distance from the regression line. 
B) all dots lie on the regression line. 
C) the regression line forms a right angle at its intersection with the X axis. 
D) the regression line is parallel to the X axis.

Question 11

Scattergrams do NOT give information about the ____ of a relationship.

Accepted Answer

A) strength 
B) direction 
C) linearity 
D) significance 
A) strength 
B) direction 
C) linearity 
D) significance

Question 12

The text reported information about the relationship between crime and poverty.The sample used was

Accepted Answer

A) 1000 randomly selected Americans. 
B) a group of inmates from a federal penitentiary. 
C) a large group of high school students. 
D) the fifty states. 
A) 1000 randomly selected Americans. 
B) a group of inmates from a federal penitentiary. 
C) a large group of high school students. 
D) the fifty states.

Question 13

If a = 2 and b = 4,what would the value of Y be when X = 1?

Accepted Answer

A) 4 
B) 6 
C) 2 
D) 1 
A) 4 
B) 6 
C) 2 
D) 1

Question 14

After scores of all cases have been located on a scattergram,a straight line drawn so that it comes as close as possible to touching every score is called the

Accepted Answer

A) regression line. 
B) line of approximation. 
C) cluster line. 
D) scattergram summary. 
A) regression line. 
B) line of approximation. 
C) cluster line. 
D) scattergram summary.

Question 15

Dummy variables make it possible to include ____ in regression analysis.

Accepted Answer

A) nominal variables 
B) variables measuring intelligence 
C) interval-ratio variables 
D) variables with more than two scores 
A) nominal variables 
B) variables measuring intelligence 
C) interval-ratio variables 
D) variables with more than two scores

Question 16

By convention,the dependent variable is arrayed along the ____ in a scattergram.

Accepted Answer

A) vertical axis (the ordinate) 
B) regression line 
C) horizontal axis (the abscissa) 
D) calibration line 
A) vertical axis (the ordinate) 
B) regression line 
C) horizontal axis (the abscissa) 
D) calibration line

Question 17

The appropriate measure of association for situations in which both variables are interval-ratio in level of measurement is

Accepted Answer

A) Pearson's r. 
B) gamma. 
C) chi square. 
D) the slope (b). 
A) Pearson's r. 
B) gamma. 
C) chi square. 
D) the slope (b).

Question 18

In the study reported in the text,the Pearson's r between the measures of poverty and crime was 0.54.Which of the following is a reasonable interpretation of this result?

Accepted Answer

A) poverty causes crime 
B) crime causes poverty 
C) as poverty increases,crime decreases 
D) there is a moderate,positive correlation between poverty and crime 
A) poverty causes crime 
B) crime causes poverty 
C) as poverty increases,crime decreases 
D) there is a moderate,positive correlation between poverty and crime

Question 19

By convention,the independent variable is arrayed along the ____ in a scattergram.

Accepted Answer

A) vertical axis (the ordinate) 
B) regression line 
C) horizontal axis (the abscissa) 
D) calibration line 
A) vertical axis (the ordinate) 
B) regression line 
C) horizontal axis (the abscissa) 
D) calibration line

Question 20

One important function of the least-squares regression equation is that

Accepted Answer

A) we can use it to tell if a relationship is linear. 
B) it summarizes all possible scores on the two variables. 
C) it makes the scattergram symmetrical. 
D) it allows us to predict Y scores for any value of X. 
A) we can use it to tell if a relationship is linear. 
B) it summarizes all possible scores on the two variables. 
C) it makes the scattergram symmetrical. 
D) it allows us to predict Y scores for any value of X.

If the regression line on a scattergram slopes upward from left to right,the relationship is

The Y intercept is the point where

One key assumption of correlation analysis is that the variables have an essentially ____ relationship.

The coefficient of determination may be interpreted with a logic akin to

The explained variation represents

A researcher reports a Pearson r of .57 between gender (female = 0,males = 1) and involvement in juvenile delinquency.Which of the following is an appropriate interpretation?

When referring to interval-ratio variables,a commonly used synonym for association is

For summarizing the relationship between X and Y,the points of minimized variation for the conditional distributions of Y provide us with

A perfect association between variables can be seen on a scattergram when

Scattergrams do NOT give information about the ____ of a relationship.

The text reported information about the relationship between crime and poverty.The sample used was

If a = 2 and b = 4,what would the value of Y be when X = 1?

After scores of all cases have been located on a scattergram,a straight line drawn so that it comes as close as possible to touching every score is called the

Dummy variables make it possible to include ____ in regression analysis.

By convention,the dependent variable is arrayed along the ____ in a scattergram.

The appropriate measure of association for situations in which both variables are interval-ratio in level of measurement is

In the study reported in the text,the Pearson's r between the measures of poverty and crime was 0.54.Which of the following is a reasonable interpretation of this result?

By convention,the independent variable is arrayed along the ____ in a scattergram.

One important function of the least-squares regression equation is that

Introduction

Basic Descriptive Statistics: Percentages, Ratios and Rates, Tables, Charts and Graphs

Measures of Central Tendency

Measures of Dispersion

The Normal Curve

Introduction to Inferential Statistics: Sampling and the Sampling Distribution

Estimation Procedures

Hypothesis Testing I: the One-Sample Case

Hypothesis Testing II: the Two-Sample Case

Hypothesis Testing III: the Analysis of Variance

Hypothesis Testing Iv: Chi Square

Bivariate Association: Introduction and Basic Concepts

Association Between Variables Measured at the Nominal Level

Association Between Variables Measured at the Ordinal Level

Elaborating Bivariate Tables

Partial Correlation and Multiple Regression and Correlation

Filters

Exam 15: Association Between Variables Measured at the Interval-Ratio Level

If the regression line on a scattergram slopes upward from left to right,the relationship is

The Y intercept is the point where

One key assumption of correlation analysis is that the variables have an essentially ____ relationship.

The coefficient of determination may be interpreted with a logic akin to

The explained variation represents

A researcher reports a Pearson r of .57 between gender (female = 0,males = 1) and involvement in juvenile delinquency.Which of the following is an appropriate interpretation?

When referring to interval-ratio variables,a commonly used synonym for association is

For summarizing the relationship between X and Y,the points of minimized variation for the conditional distributions of Y provide us with

A perfect association between variables can be seen on a scattergram when

Scattergrams do NOT give information about the ____ of a relationship.

The text reported information about the relationship between crime and poverty.The sample used was

If a = 2 and b = 4,what would the value of Y be when X = 1?

After scores of all cases have been located on a scattergram,a straight line drawn so that it comes as close as possible to touching every score is called the

Dummy variables make it possible to include ____ in regression analysis.

By convention,the dependent variable is arrayed along the ____ in a scattergram.

The appropriate measure of association for situations in which both variables are interval-ratio in level of measurement is

In the study reported in the text,the Pearson's r between the measures of poverty and crime was 0.54.Which of the following is a reasonable interpretation of this result?

By convention,the independent variable is arrayed along the ____ in a scattergram.

One important function of the least-squares regression equation is that

Introduction

Basic Descriptive Statistics: Percentages, Ratios and Rates, Tables, Charts and Graphs

Measures of Central Tendency

Measures of Dispersion

The Normal Curve

Introduction to Inferential Statistics: Sampling and the Sampling Distribution

Estimation Procedures

Hypothesis Testing I: the One-Sample Case

Hypothesis Testing II: the Two-Sample Case

Hypothesis Testing III: the Analysis of Variance

Hypothesis Testing Iv: Chi Square

Bivariate Association: Introduction and Basic Concepts

Association Between Variables Measured at the Nominal Level

Association Between Variables Measured at the Ordinal Level

Elaborating Bivariate Tables

Partial Correlation and Multiple Regression and Correlation

Filters