Question 1

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

Accepted Answer

A)  The index of qualitative variation 
B)  The average deviation 
C)  The quartile deviation 
D)  The standard deviation 
A)  The index of qualitative variation 
B)  The average deviation 
C)  The quartile deviation 
D)  The standard deviation

Question 2

When measures of central tendency and dispersion are presented in the literature, the number of cases may vary from variable to variable. This is because________.

Accepted Answer

A)  the researchers only used a subset of their sample for convenience purposes. 
B)  cases were missing values for that variable. 
C)  the variable in those cases was measured at a different level. 
D)  none of these choices are correct. 
A)  the researchers only used a subset of their sample for convenience purposes. 
B)  cases were missing values for that variable. 
C)  the variable in those cases was measured at a different level. 
D)  none of these choices are correct.

Question 3

Measures of central tendency (like the mean) and measures of variation (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 4

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 5

A boxplot uses what to show the range of scores?

Accepted Answer

A)  slices 
B)  bars 
C)  points 
D)  whiskers 
A)  slices 
B)  bars 
C)  points 
D)  whiskers

Question 6

Measures of variation provide information about the________.

Accepted Answer

A)  typical or most common score. 
B)  variety within the distribution of scores. 
C)  size of the sample. 
D)  adequacy of the selection criteria for the sample. 
A)  typical or most common score. 
B)  variety within the distribution of scores. 
C)  size of the sample. 
D)  adequacy of the selection criteria for the sample.

Question 7

Which measure of variation 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 8

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 9

Since the 1960s, the income associated with the 80th percentile has ________ and the income associated with the 20th percentile has ________.

Accepted Answer

A)  risen, risen 
B)  stayed roughly the same, risen 
C)  fallen, risen 
D)  risen, stayed roughly the same 
A)  risen, risen 
B)  stayed roughly the same, risen 
C)  fallen, risen 
D)  risen, stayed roughly the same

Question 10

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

Accepted Answer

A)  The index of qualitative variation 
B)  The average deviation 
C)  The quartile deviation 
D)  The standard deviation 
A)  The index of qualitative variation 
B)  The average deviation 
C)  The quartile deviation 
D)  The standard deviation

Question 11

Boxplots depict________.

Accepted Answer

A)  central tendency. 
B)  dispersion. 
C)  both central tendency and dispersion. 
D)  None of these choices are correct. 
A)  central tendency. 
B)  dispersion. 
C)  both central tendency and dispersion. 
D)  None of these choices are correct.

Question 12

When you subtract the value of the mean from each score in a distribution and then add the results, the sum will be________.

Accepted Answer

A)  0. 
B)  the standard deviation. 
C)  the variance. 
D)  a positive number. 
A)  0. 
B)  the standard deviation. 
C)  the variance. 
D)  a positive number.

Question 13

According to the data presented in the text, incomes in the US are________.

Accepted Answer

A)  falling for the average family. 
B)  rising for everyone except the very rich. 
C)  decreasing in variation (income inequality is decreasing). 
D)  increasing in variation (income inequality is increasing). 
A)  falling for the average family. 
B)  rising for everyone except the very rich. 
C)  decreasing in variation (income inequality is decreasing). 
D)  increasing in variation (income inequality is increasing).

Question 14

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 15

The expression   instructs us to ________.

Accepted Answer

A)  square the sum of the scores. 
B)  sum the squared scores. 
C)  sum the squared deviations. 
D)  square the summed deviations. 
A)  square the sum of the scores. 
B)  sum the squared scores. 
C)  sum the squared deviations. 
D)  square the summed deviations.

Question 16

The interquartile range would be an appropriate measure of variation 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 17

Measures of variation indicate the degree to which a set of scores is________.

Accepted Answer

A)  heterogeneous. 
B)  ambiguous. 
C)  average. 
D)  typical. 
A)  heterogeneous. 
B)  ambiguous. 
C)  average. 
D)  typical.

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

When measures of central tendency and dispersion are presented in the literature, the number of cases may vary from variable to variable. This is because________.

Measures of central tendency (like the mean) and measures of variation (like the range) provide information about distributions of scores which is________.

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

A boxplot uses what to show the range of scores?

Measures of variation provide information about the________.

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

The distances between the scores and the mean are called________.

Since the 1960s, the income associated with the 80th percentile has and the income associated with the 20th percentile has .

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

Boxplots depict________.

When you subtract the value of the mean from each score in a distribution and then add the results, the sum will be________.

According to the data presented in the text, incomes in the US are________.

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

The expression instructs us to ________.

The interquartile range would be an appropriate measure of variation for________.

Measures of variation indicate the degree to which a set of scores is________.

Introduction

Basic Descriptive Statistics Tables Percentages Rates and Ratios 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 for Nominal and Ordinal Level Variables

Association Between Variables Measured at the Interval Ratio Level

Elaborating Bivariate Tables

Partial Correlation and Multiple Regression and Correlation

Filters

Exam 4: Measures of Variation

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

When measures of central tendency and dispersion are presented in the literature, the number of cases may vary from variable to variable. This is because________.

Measures of central tendency (like the mean) and measures of variation (like the range) provide information about distributions of scores which is________.

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

A boxplot uses what to show the range of scores?

Measures of variation provide information about the________.

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

The distances between the scores and the mean are called________.

Since the 1960s, the income associated with the 80th percentile has ________ and the income associated with the 20th percentile has ________.

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

Boxplots depict________.

When you subtract the value of the mean from each score in a distribution and then add the results, the sum will be________.

According to the data presented in the text, incomes in the US are________.

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

The expression instructs us to ________.

The interquartile range would be an appropriate measure of variation for________.

Measures of variation indicate the degree to which a set of scores is________.

Introduction

Basic Descriptive Statistics Tables Percentages Rates and Ratios 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 for Nominal and Ordinal Level Variables

Association Between Variables Measured at the Interval Ratio Level

Elaborating Bivariate Tables

Partial Correlation and Multiple Regression and Correlation

Filters

Since the 1960s, the income associated with the 80th percentile has and the income associated with the 20th percentile has .