Question 1

Any set of scores may be described by measures of ________ and ________.

Accepted Answer

A)  chance variance;error variance 
B)  central tendency;variability 
C)  independent variables;dependent variables 
D)  probability;significance

Question 2

An ordinal scale of measurement lacks which one of the following properties of a scale?

Accepted Answer

A)  Equal orders 
B)  Unequal orders 
C)  Equal intervals 
D)  Unequal intervals

Question 3

A researcher measures the time it takes for subjects to press a button following a signal.This is a(n)________ measure.

Accepted Answer

A)  nominal scale 
B)  ratio scale 
C)  ordinal scale 
D)  interval scale

Question 4

At the beginning of the season,a sports writer gives her prediction of teams that will finish in the top three places in the eastern,central,and western divisions.Her prediction would be an example of using which type of measurement scale?

Accepted Answer

A)  Nominal 
B)  Ordinal 
C)  Interval 
D)  Ratio

Question 5

After establishing that there is a reasonably high correlation between two variables,a researcher can utilize a regression equation to make predictions about the _____ variable from the _____ variable.

Accepted Answer

A)  predictor;criterion 
B)  criterion;predictor 
C)  independent;dependent 
D)  dependent;independent

Question 6

Which one of the following is not a measure of variability?

Accepted Answer

A)  Standard variance 
B)  Range 
C)  Variance 
D)  Standard deviation

Question 7

Researchers studying the effectiveness of a diet on heart disease separated the study's participants into two groups,those with Type A personalities and those with Type B personalities.What scale characterizes the personality variable?

Accepted Answer

A)  Nominal 
B)  Ordinal 
C)  Interval 
D)  Ratio

Question 8

In a _____,a separate and distinct _____ is drawn to represent the number of people who received each possible score.

Accepted Answer

A)  polygon;bar 
B)  bar graph;line 
C)  bar graph;bar 
D)  polygon;pie slice

Question 9

Multiple correlation utilizes many _____ variables and one _____ variable.

Accepted Answer

A)  interval;ratio 
B)  ratio;interval 
C)  predictor;criterion 
D)  criterion;predictor

Question 10

John finds the Pearson r correlation coefficient between variable A and variable B to be 0.00.Before concluding there is no relationship between the variables,John should

Accepted Answer

A)  use a different set of participants. 
B)  restrict the range from which he samples. 
C)  construct a scatterplot of the data. 
D)  calculate the effect size for the relationship.

Question 11

An automobile repair shop reports that half of the automobiles they repair have a resale value below $8000.In this example,the $8000 represents which measure of central tendency?

Accepted Answer

A)  Mean 
B)  Mode 
C)  Median 
D)  Standard deviation

Question 12

A(n)_____ allows a researcher to statistically control for the influence of a third variable.

Accepted Answer

A)  criterion assessment 
B)  effect size 
C)  multiple correlation 
D)  partial correlation

Question 13

Which one of the following is NOT a measure of central tendency?

Accepted Answer

A)  Mean 
B)  Median 
C)  Meridian 
D)  Mode

Question 14

The _____ is a general term that refers to the strength of association between variables.

Accepted Answer

A)  statistical index 
B)  effect size 
C)  standard deviation 
D)  linear degree

Question 15

Which of the following is NOT true of the standard deviation? It

Accepted Answer

A)  indicates the average deviation of scores from the mean. 
B)  is the square of the variance. 
C)  becomes larger the further the scores are from the mean. 
D)  is appropriate only for interval and ratio scale variables.

Question 16

Dr.Greentree finds the r2 value between days of sunlight (X)and plant growth (Y)to be +.48.Dr.Greentree can conclude

Accepted Answer

A)  48% of plants will grow on sunny days. 
B)  plants will grow 48% taller on sunny days. 
C)  48% of the variability in plant growth can be accounted for by the number of days of sunlight. 
D)  plants will grow 48% less on cloudy days.

Question 17

Which one of the following would be an appropriate measure of central tendency to summarize interval data?

Accepted Answer

A)  Mean 
B)  Median 
C)  Mode 
D)  Mean,median,or mode would be appropriate.

Question 18

The standard deviation would be an appropriate measure of variability only if the variable is measured on a(n)_____ scale.

Accepted Answer

A)  nominal 
B)  ordinal 
C)  interval 
D)  ratio

Question 19

A professional baseball scout uses the batting average,on base percentage,throwing ability,and running speed of amateur baseball players to predict their success as professional baseball players.This strategy would be an example of using a(n)_____ as a predictor of likelihood of success.

Accepted Answer

A)  effect size 
B)  multiple correlation 
C)  practicality assessment 
D)  criterion variable assessment.

Question 20

In a survey examining the number of 3rd versus 6th grade students who buy their lunch at school,the most appropriate description of the results would be to

Accepted Answer

A)  compare group percentages. 
B)  correlate scores. 
C)  compare group means. 
D)  compare lunches.

Exam 12: Understanding Research Results: Describ-Ingvariables and Relationships Among Them

Any set of scores may be described by measures of and .

An ordinal scale of measurement lacks which one of the following properties of a scale?

A researcher measures the time it takes for subjects to press a button following a signal.This is a(n) ________ measure.

At the beginning of the season,a sports writer gives her prediction of teams that will finish in the top three places in the eastern,central,and western divisions.Her prediction would be an example of using which type of measurement scale?

After establishing that there is a reasonably high correlation between two variables,a researcher can utilize a regression equation to make predictions about the _ variable from the _ variable.

Which one of the following is not a measure of variability?

Researchers studying the effectiveness of a diet on heart disease separated the study's participants into two groups,those with Type A personalities and those with Type B personalities.What scale characterizes the personality variable?

In a _,a separate and distinct _ is drawn to represent the number of people who received each possible score.

Multiple correlation utilizes many _ variables and one _ variable.

John finds the Pearson r correlation coefficient between variable A and variable B to be 0.00.Before concluding there is no relationship between the variables,John should

An automobile repair shop reports that half of the automobiles they repair have a resale value below $8000.In this example,the $8000 represents which measure of central tendency?

A(n) _____ allows a researcher to statistically control for the influence of a third variable.

Which one of the following is NOT a measure of central tendency?

The _____ is a general term that refers to the strength of association between variables.

Which of the following is NOT true of the standard deviation? It

Dr.Greentree finds the r² value between days of sunlight (X) and plant growth (Y) to be +.48.Dr.Greentree can conclude

Which one of the following would be an appropriate measure of central tendency to summarize interval data?

The standard deviation would be an appropriate measure of variability only if the variable is measured on a(n) _____ scale.

A professional baseball scout uses the batting average,on base percentage,throwing ability,and running speed of amateur baseball players to predict their success as professional baseball players.This strategy would be an example of using a(n) _____ as a predictor of likelihood of success.

In a survey examining the number of 3^rd versus 6^th grade students who buy their lunch at school,the most appropriate description of the results would be to

Exam 12: Understanding Research Results: Describ-Ingvariables and Relationships Among Them

Any set of scores may be described by measures of ________ and ________.

An ordinal scale of measurement lacks which one of the following properties of a scale?

A researcher measures the time it takes for subjects to press a button following a signal.This is a(n) ________ measure.

At the beginning of the season,a sports writer gives her prediction of teams that will finish in the top three places in the eastern,central,and western divisions.Her prediction would be an example of using which type of measurement scale?

After establishing that there is a reasonably high correlation between two variables,a researcher can utilize a regression equation to make predictions about the _____ variable from the _____ variable.

Which one of the following is not a measure of variability?

Researchers studying the effectiveness of a diet on heart disease separated the study's participants into two groups,those with Type A personalities and those with Type B personalities.What scale characterizes the personality variable?

In a _____,a separate and distinct _____ is drawn to represent the number of people who received each possible score.

Multiple correlation utilizes many _____ variables and one _____ variable.

John finds the Pearson r correlation coefficient between variable A and variable B to be 0.00.Before concluding there is no relationship between the variables,John should

An automobile repair shop reports that half of the automobiles they repair have a resale value below $8000.In this example,the $8000 represents which measure of central tendency?

A(n) _____ allows a researcher to statistically control for the influence of a third variable.

Which one of the following is NOT a measure of central tendency?

The _____ is a general term that refers to the strength of association between variables.

Which of the following is NOT true of the standard deviation? It

Dr.Greentree finds the r2 value between days of sunlight (X) and plant growth (Y) to be +.48.Dr.Greentree can conclude

Which one of the following would be an appropriate measure of central tendency to summarize interval data?

The standard deviation would be an appropriate measure of variability only if the variable is measured on a(n) _____ scale.

A professional baseball scout uses the batting average,on base percentage,throwing ability,and running speed of amateur baseball players to predict their success as professional baseball players.This strategy would be an example of using a(n) _____ as a predictor of likelihood of success.

In a survey examining the number of 3rd versus 6th grade students who buy their lunch at school,the most appropriate description of the results would be to

Any set of scores may be described by measures of and .

After establishing that there is a reasonably high correlation between two variables,a researcher can utilize a regression equation to make predictions about the _ variable from the _ variable.

In a _,a separate and distinct _ is drawn to represent the number of people who received each possible score.

Multiple correlation utilizes many _ variables and one _ variable.

Dr.Greentree finds the r² value between days of sunlight (X) and plant growth (Y) to be +.48.Dr.Greentree can conclude

In a survey examining the number of 3^rd versus 6^th grade students who buy their lunch at school,the most appropriate description of the results would be to