Question 1

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 2

Which of the following is a correct description of the distribution of income in the US since the 1960s?

Accepted Answer

A) the mean income has risen but the median has fallen 
B) both the mean and the median have risen but the mean has increased more 
C) there is a noticeable negative skew in the distribution 
D) the distribution has grown less variable 
A) the mean income has risen but the median has fallen 
B) both the mean and the median have risen but the mean has increased more 
C) there is a noticeable negative skew in the distribution 
D) the distribution has grown less variable

Question 3

If a variable is interval-ratio in level of measurement,the preferred measure of dispersion would be

Accepted Answer

A) the mean. 
B) the range. 
C) the standard deviation. 
D) the percentile. 
A) the mean. 
B) the range. 
C) the standard deviation. 
D) the percentile.

Question 4

The index of qualitative variation (IQV)varies from 0.00 to 1.00.Which of the IQV's below shows the greatest degree of homogeneity?

Accepted Answer

A) 0.25 
B) 0.50 
C) 0.75 
D) 1.00 
A) 0.25 
B) 0.50 
C) 0.75 
D) 1.00

Question 5

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 6

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 7

If the standard deviation of a group of scores is 0,

Accepted Answer

A) the range would be at a maximum value. 
B) there is maximum variation in the scores. 
C) there is no variation in the scores. 
D) the mean is larger than the median. 
A) the range would be at a maximum value. 
B) there is maximum variation in the scores. 
C) there is no variation in the scores. 
D) the mean is larger than the median.

Question 8

The text presents information on the central tendency and dispersion of income in the U.S.Dispersion is measured by

Accepted Answer

A) the standard deviation. 
B) the difference between the 20th and 80th percentiles. 
C) the range. 
D) the Interquartile range. 
A) the standard deviation. 
B) the difference between the 20th and 80th percentiles. 
C) the range. 
D) the Interquartile range.

Question 9

Which of the following is true? Since the 1960s,

Accepted Answer

A) the distribution of income has become more heterogeneous. 
B) average income has fallen. 
C) median income increased until the 1990s and then fell. 
D) the distribution of income has become more homogeneous 
A) the distribution of income has become more heterogeneous. 
B) average income has fallen. 
C) median income increased until the 1990s and then fell. 
D) the distribution of income has become more homogeneous

Question 10

If a distribution of scores has a mean of 30 and a range of 0:

Accepted Answer

A) the variance is 30 
B) the quartile deviation (Q)is 10 
C) there is no dispersion in the distribution 
D) the standard deviation is 1 
A) the variance is 30 
B) the quartile deviation (Q)is 10 
C) there is no dispersion in the distribution 
D) the standard deviation is 1

Question 11

The interquartile range would be an appropriate measure of dispersion for

Accepted Answer

A) nominal level variables. 
B) continuous interval-ratio level variables only. 
C) ordinal level variables. 
D) discrete interval-ratio level variables only. 
A) nominal level variables. 
B) continuous interval-ratio level variables only. 
C) ordinal level variables. 
D) discrete interval-ratio level variables only.

Question 12

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.

Question 13

For the variable gender,which of the following should be used to measure dispersion?

Accepted Answer

A) the index of qualitative variation 
B) the range 
C) the average deviation 
D) the variance 
A) the index of qualitative variation 
B) the range 
C) the average deviation 
D) the variance

Question 14

For the variable region of birth,which of the following should be used to measure dispersion?

Accepted Answer

A) the index of qualitative variation 
B) the range 
C) the average deviation 
D) the variance 
A) the index of qualitative variation 
B) the range 
C) the average deviation 
D) the variance

Question 15

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 16

Four students have applied to a special program and only one can be accepted.They have taken a battery of 12 tests and all have exactly the same average score.The standard deviation of their test scores are: Student A = 3.12,Student B = 0.27,Student C = 13.45,Student D = 6.45.If consistency of performance is a criteria for acceptance,which of the four students should be selected?

Accepted Answer

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

Question 17

Which of the following data sets shows the greatest variability?

Accepted Answer

A) 9,10,11 
B) 0,5,9 
C) 50,60,170 
D) 31,33,35 
A) 9,10,11 
B) 0,5,9 
C) 50,60,170 
D) 31,33,35

Question 18

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 19

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 20

The sum of the squared deviations around the mean for a distribution of 10 scores is 1000.The standard deviation

Accepted Answer

A) is 10. 
B) is 100. 
C) is 1. 
D) can't be determined from this information. 
A) is 10. 
B) is 100. 
C) is 1. 
D) can't be determined from this information.

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

Which of the following is a correct description of the distribution of income in the US since the 1960s?

If a variable is interval-ratio in level of measurement,the preferred measure of dispersion would be

The index of qualitative variation (IQV)varies from 0.00 to 1.00.Which of the IQV's below shows the greatest degree of homogeneity?

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

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

If the standard deviation of a group of scores is 0,

The text presents information on the central tendency and dispersion of income in the U.S.Dispersion is measured by

Which of the following is true? Since the 1960s,

If a distribution of scores has a mean of 30 and a range of 0:

The interquartile range would be an appropriate measure of dispersion for

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

For the variable gender,which of the following should be used to measure dispersion?

For the variable region of birth,which of the following should be used to measure dispersion?

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

Which of the following data sets shows the greatest variability?

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

The distances between the scores and the mean are called

The sum of the squared deviations around the mean for a distribution of 10 scores is 1000.The standard deviation

Introduction

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

Measures of Central Tendency

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

Association Between Variables Measured at the Interval-Ratio Level

Elaborating Bivariate Tables

Partial Correlation and Multiple Regression and Correlation

Filters

Exam 4: Measures of Dispersion

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

Which of the following is a correct description of the distribution of income in the US since the 1960s?

If a variable is interval-ratio in level of measurement,the preferred measure of dispersion would be

The index of qualitative variation (IQV)varies from 0.00 to 1.00.Which of the IQV's below shows the greatest degree of homogeneity?

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

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

If the standard deviation of a group of scores is 0,

The text presents information on the central tendency and dispersion of income in the U.S.Dispersion is measured by

Which of the following is true? Since the 1960s,

If a distribution of scores has a mean of 30 and a range of 0:

The interquartile range would be an appropriate measure of dispersion for

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

For the variable gender,which of the following should be used to measure dispersion?

For the variable region of birth,which of the following should be used to measure dispersion?

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

Which of the following data sets shows the greatest variability?

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

The distances between the scores and the mean are called

The sum of the squared deviations around the mean for a distribution of 10 scores is 1000.The standard deviation

Introduction

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

Measures of Central Tendency

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

Association Between Variables Measured at the Interval-Ratio Level

Elaborating Bivariate Tables

Partial Correlation and Multiple Regression and Correlation

Filters