Question 1

Which measure of dispersion is most important and most commonly used in social science research?

Accepted Answer

A)  the range 
B)  the average deviation 
C)  the median 
D)  the standard deviation 
A)  the range 
B)  the average deviation 
C)  the median 
D)  the standard deviation

Question 2

One problem with the range (R) as a measure of dispersion is that it

Accepted Answer

A)  is very difficult to calculate 
B)  ignores the most extreme scores 
C)  can be used only for nominal level variables 
D)  is based on only the most extreme scores 
A)  is very difficult to calculate 
B)  ignores the most extreme scores 
C)  can be used only for nominal level variables 
D)  is based on only the most extreme scores

Question 3

The distances between the scores and the mean are called

Accepted Answer

A)  deviations 
B)  differences 
C)  ranges 
D)  summations 
A)  deviations 
B)  differences 
C)  ranges 
D)  summations

Question 4

If a test score lies at the first quartile, it is

Accepted Answer

A)  higher than 25% of the scores 
B)  the same as the median 
C)  the same as the mode 
D)  higher than 75% of the scores 
A)  higher than 25% of the scores 
B)  the same as the median 
C)  the same as the mode 
D)  higher than 75% of the scores

Question 5

In the text, we examined the distribution of starting salaries for lawyers in 2012. The average salary was $81,000 but this might be misleading because the distribution

Accepted Answer

A)  had a strong positive skew 
B)  had a strong negative skew 
C)  was bimodal, with few salaries close to the mean 
D)  had a range of only $10,000 
A)  had a strong positive skew 
B)  had a strong negative skew 
C)  was bimodal, with few salaries close to the mean 
D)  had a range of only $10,000

Question 6

Changes since 1980 show that Americans are growing more ______ in terms of race

Accepted Answer

A)  similar 
B)  alike 
C)  diverse 
D)  predictable 
A)  similar 
B)  alike 
C)  diverse 
D)  predictable

Question 7

The range (R) is found by subtracting the lowest from the highest score in the distribution. Therefore, R could NOT be found for

Accepted Answer

A)  nominal level variables 
B)  non-proportional variables 
C)  ordinal level variables 
D)  skewed variables 
A)  nominal level variables 
B)  non-proportional variables 
C)  ordinal level variables 
D)  skewed variables

Question 8

Since computation of the standard deviation requires addition, division, and other mathematical operations, it should be used for

Accepted Answer

A)  interval-ratio level variables 
B)  variables at any level of measurement 
C)  nominal level variables 
D)  ordinal level variables only 
A)  interval-ratio level variables 
B)  variables at any level of measurement 
C)  nominal level variables 
D)  ordinal level variables only

Question 9

If the variance of a distribution is 16, the mean is 12, and the number of cases is 24, the standard deviation is

Accepted Answer

A)  4 
B)  6 
C)  8 
D)  12 
A)  4 
B)  6 
C)  8 
D)  12

Question 10

In the text, we used SPSS to compare state homicide rates in 1995 and 2012. According to the results, the average rate _____ and the distribution became _____ dispersed.

Accepted Answer

A)  increased … less 
B)  increased … more 
C)  decreased … more 
D)  decreased … less 
A)  increased … less 
B)  increased … more 
C)  decreased … more 
D)  decreased … less

Question 11

In a boxplot, the distance from the upper to the lower "whisker" reflect the value of the

Accepted Answer

A)  range 
B)  median 
C)  standard deviation 
D)  mean 
A)  range 
B)  median 
C)  standard deviation 
D)  mean

Question 12

The lower limit for the standard deviation is 0; the upper limit is

Accepted Answer

A)  the score of the mean 
B)  the score of the median 
C)  a function of the number of cases 
D)  undefined; there is no upper limit 
A)  the score of the mean 
B)  the score of the median 
C)  a function of the number of cases 
D)  undefined; there is no upper limit

Question 13

The income of a sample has been measured in dollars per year. Which of the following would be the preferred measure the dispersion for this variable? The

Accepted Answer

A)  index of variation 
B)  average deviation 
C)  interquartile range 
D)  standard deviation 
A)  index of variation 
B)  average deviation 
C)  interquartile range 
D)  standard deviation

Question 14

Measures of central tendency (like the mean) and measures of dispersion (like the range) provide information about distributions of scores which is

Accepted Answer

A)  contradictory 
B)  redundant 
C)  unnecessary 
D)  complementary 
A)  contradictory 
B)  redundant 
C)  unnecessary 
D)  complementary

Question 15

The age of a sample has been measured in years. Which of the following would be the preferred measure the dispersion for this variable? The

Accepted Answer

A)  index of variation 
B)  average deviation 
C)  interquartile range 
D)  standard deviation 
A)  index of variation 
B)  average deviation 
C)  interquartile range 
D)  standard deviation

Question 16

The greater the skew of a distribution of scores,

Accepted Answer

A)  the lower the value of the standard deviation 
B)  the higher the value of the standard deviation 
C)  the lower the value of the range 
D)  none of the above. Measures of dispersion are not affected by skew. 
A)  the lower the value of the standard deviation 
B)  the higher the value of the standard deviation 
C)  the lower the value of the range 
D)  none of the above. Measures of dispersion are not affected by skew.

Question 17

If male and female college students work an average of 15 hours per week during the school year and the standard deviation is 5.4 for male students and 2.3 for female students, what may we conclude?

Accepted Answer

A)  males are more heterogeneous on this variable 
B)  females are more heterogeneous on this variable 
C)  the median number of hours worked is the same 
D)  the modal number of hours worked is the same 
A)  males are more heterogeneous on this variable 
B)  females are more heterogeneous on this variable 
C)  the median number of hours worked is the same 
D)  the modal number of hours worked is the same

Question 18

Your score on a test is the same as the third quartile (Q3). You may conclude that

Accepted Answer

A)  you scored higher than 75% of the people who took the test 
B)  the distribution of the scores is skewed 
C)  your score is 'typical' since it is the same value as the median 
D)  you scored higher than 25% of the people who took the test 
A)  you scored higher than 75% of the people who took the test 
B)  the distribution of the scores is skewed 
C)  your score is 'typical' since it is the same value as the median 
D)  you scored higher than 25% of the people who took the test

Question 19

An advantage of the interquartile range (Q) over the range (R) is that it

Accepted Answer

A)  can be used for nominal level variables. 
B)  includes the most extreme scores 
C)  is based on only the middle 50% of the scores 
D)  ignores the first and third quartiles 
A)  can be used for nominal level variables. 
B)  includes the most extreme scores 
C)  is based on only the middle 50% of the scores 
D)  ignores the first and third quartiles

Which measure of dispersion is most important and most commonly used in social science research?

One problem with the range (R) as a measure of dispersion is that it

The distances between the scores and the mean are called

If a test score lies at the first quartile, it is

In the text, we examined the distribution of starting salaries for lawyers in 2012. The average salary was $81,000 but this might be misleading because the distribution

Changes since 1980 show that Americans are growing more ______ in terms of race

The range (R) is found by subtracting the lowest from the highest score in the distribution. Therefore, R could NOT be found for

Since computation of the standard deviation requires addition, division, and other mathematical operations, it should be used for

If the variance of a distribution is 16, the mean is 12, and the number of cases is 24, the standard deviation is

In the text, we used SPSS to compare state homicide rates in 1995 and 2012. According to the results, the average rate _ and the distribution became _ dispersed.

In a boxplot, the distance from the upper to the lower "whisker" reflect the value of the

The lower limit for the standard deviation is 0; the upper limit is

The income of a sample has been measured in dollars per year. Which of the following would be the preferred measure the dispersion for this variable? The

Measures of central tendency (like the mean) and measures of dispersion (like the range) provide information about distributions of scores which is

The age of a sample has been measured in years. Which of the following would be the preferred measure the dispersion for this variable? The

The greater the skew of a distribution of scores,

If male and female college students work an average of 15 hours per week during the school year and the standard deviation is 5.4 for male students and 2.3 for female students, what may we conclude?

Your score on a test is the same as the third quartile (Q3). You may conclude that

An advantage of the interquartile range (Q) over the range (R) is that it

Introduction

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

Measures of Central Tendency

The Normal Curve

Introduction to Inferential Statistics Sampling the Sampling Distribution

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 for Nominal- and Ordinal-Level Variables

Association Between Variables Measured at the Interval-Ratio Level

Partial Correlation and

Filters

Exam 4: Measures of Dispersion

Which measure of dispersion is most important and most commonly used in social science research?

One problem with the range (R) as a measure of dispersion is that it

The distances between the scores and the mean are called

If a test score lies at the first quartile, it is

In the text, we examined the distribution of starting salaries for lawyers in 2012. The average salary was $81,000 but this might be misleading because the distribution

Changes since 1980 show that Americans are growing more ______ in terms of race

The range (R) is found by subtracting the lowest from the highest score in the distribution. Therefore, R could NOT be found for

Since computation of the standard deviation requires addition, division, and other mathematical operations, it should be used for

If the variance of a distribution is 16, the mean is 12, and the number of cases is 24, the standard deviation is

In the text, we used SPSS to compare state homicide rates in 1995 and 2012. According to the results, the average rate _____ and the distribution became _____ dispersed.

In a boxplot, the distance from the upper to the lower "whisker" reflect the value of the

The lower limit for the standard deviation is 0; the upper limit is

The income of a sample has been measured in dollars per year. Which of the following would be the preferred measure the dispersion for this variable? The

Measures of central tendency (like the mean) and measures of dispersion (like the range) provide information about distributions of scores which is

The age of a sample has been measured in years. Which of the following would be the preferred measure the dispersion for this variable? The

The greater the skew of a distribution of scores,

If male and female college students work an average of 15 hours per week during the school year and the standard deviation is 5.4 for male students and 2.3 for female students, what may we conclude?

Your score on a test is the same as the third quartile (Q3). You may conclude that

An advantage of the interquartile range (Q) over the range (R) is that it

Introduction

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

Measures of Central Tendency

The Normal Curve

Introduction to Inferential Statistics Sampling the Sampling Distribution

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 for Nominal- and Ordinal-Level Variables

Association Between Variables Measured at the Interval-Ratio Level

Partial Correlation and

Filters

In the text, we used SPSS to compare state homicide rates in 1995 and 2012. According to the results, the average rate _ and the distribution became _ dispersed.