Question 1

The mode measures "central tendency" in terms of the most

Accepted Answer

A) common score. 
B) central case. 
C) important score. 
D) average case. 
A) common score. 
B) central case. 
C) important score. 
D) average case. A

Question 2

The mean defines "central tendency" in terms of the

Accepted Answer

A) most common score. 
B) typical case. 
C) average score. 
D) most likely score. 
A) most common score. 
B) typical case. 
C) average score. 
D) most likely score. C

Question 3

Which of the following correctly matches the level of measurement of a variable with the preferred measure of central tendency?

Accepted Answer

A) nominal ...mean 
B) ordinal ...mode 
C) interval-ratio ...mode 
D) ordinal ...median 
A) nominal ...mean 
B) ordinal ...mode 
C) interval-ratio ...mode 
D) ordinal ...median D

Question 4

The purpose of measures of central tendency is to describe what value of a distribution of scores is

Accepted Answer

A) the most typical or representative. 
B) the most surprising or unexpected. 
C) the most significant or important. 
D) all of the above 
A) the most typical or representative. 
B) the most surprising or unexpected. 
C) the most significant or important. 
D) all of the above

Question 5

To compute a median for scores that have been grouped into a frequency distribution,we assume that the scores in each interval are

Accepted Answer

A) spaced evenly across the interval. 
B) located at the upper real limit of the interval. 
C) located at the lower stated limit of the interval. 
D) located at the midpoint of the interval. 
A) spaced evenly across the interval. 
B) located at the upper real limit of the interval. 
C) located at the lower stated limit of the interval. 
D) located at the midpoint of the interval.

Question 6

Deciles,quartiles,and percentiles divide a distribution of scores into,respectively,

Accepted Answer

A) ones,twos,and threes. 
B) fourths,fifths,and thirds. 
C) tens,twenties,and forties. 
D) tens,quarters,and hundredths. 
A) ones,twos,and threes. 
B) fourths,fifths,and thirds. 
C) tens,twenties,and forties. 
D) tens,quarters,and hundredths.

Question 7

To locate the 6th decile,we would first multiply the number of cases (N)by

Accepted Answer

A) .06. 
B) .60. 
C) 6.00. 
D) the value of the median minus ten. 
A) .06. 
B) .60. 
C) 6.00. 
D) the value of the median minus ten.

Question 8

A researcher is preparing a report and wants to select a measure of central tendency that shows the most common score in a particular distribution.Which statistic should she select?

Accepted Answer

A) mode 
B) median 
C) mean 
D) none of the above 
A) mode 
B) median 
C) mean 
D) none of the above

Question 9

Which measure of central tendency is affected by every score in the distribution?

Accepted Answer

A) the mean 
B) the median 
C) the mode 
D) all of the above 
A) the mean 
B) the median 
C) the mode 
D) all of the above

Question 10

If the scores on a variable are 11,14,18,20,and 25,the median is

Accepted Answer

A) 3. 
B) 16. 
C) 18. 
D) 19. 
A) 3. 
B) 16. 
C) 18. 
D) 19.

Question 11

An instructor is preparing a report showing mid-semester grades and notes that the mean,median,and mode are all exactly 76.00.What can she conclude?

Accepted Answer

A) The distribution of grades is unskewed. 
B) There is a negative skew in the distribution (a few students have very low grades. ) 
C) There is a positive skew in the distribution (a few students have very high grades). 
D) all of the above 
A) The distribution of grades is unskewed. 
B) There is a negative skew in the distribution (a few students have very low grades. ) 
C) There is a positive skew in the distribution (a few students have very high grades). 
D) all of the above

Question 12

If you changed ONLY the highest score in a distribution of 5 scores,which of the following measure of central tendency would be affected?

Accepted Answer

A) the mean 
B) the median 
C) the mode 
D) all of the above 
A) the mean 
B) the median 
C) the mode 
D) all of the above

Question 13

You have come across some statistics regarding the average cost of new housing in your city and a nearby city over the past few years.Write a paragraph summarizing these statistics.
 $\begin{array}{|l|l|l|l|l|}
\hline & \text { City A } & \text { City B } & & \
\hline & 1990 & 2000 & 1990 & 2000 \
\hline \text { MeanCost } & 77,000 & 127,000 & 80,000 & 152,000 \
\hline \text { MedianCost } & 72,000 & 110,000 & 79,000 & 121,000 \
\hline & & & &
\end{array}$

Accepted Answer

Over the past few years, the average cos

Question 14

It is possible for a variable to have

Accepted Answer

A) one mode. 
B) many modes. 
C) no mode. 
D) all of the above 
A) one mode. 
B) many modes. 
C) no mode. 
D) all of the above

Question 15

The fourth decile would be at the same location as

Accepted Answer

A) the second quartile. 
B) the fourth percentile. 
C) the fortieth percentile. 
D) the fourth quartile. 
A) the second quartile. 
B) the fourth percentile. 
C) the fortieth percentile. 
D) the fourth quartile.

Question 16

The most appropriate measure of central tendency for the variable age (measured in years)would be the

Accepted Answer

A) mode. 
B) quartile. 
C) mean. 
D) decile. 
A) mode. 
B) quartile. 
C) mean. 
D) decile.

Question 17

If you subtracted the mean from each score in a distribution and added the results,the sum would be

Accepted Answer

A) zero. 
B) less than zero. 
C) a minimum. 
D) the mode. 
A) zero. 
B) less than zero. 
C) a minimum. 
D) the mode.

Question 18

To compute a mean for scores that have been grouped into a frequency distribution,we assume that the scores in each interval are

Accepted Answer

A) spread evenly across the interval. 
B) twice the value of the next lower interval. 
C) located at the lower real limit of the interval. 
D) located at the midpoint of the interval. 
A) spread evenly across the interval. 
B) twice the value of the next lower interval. 
C) located at the lower real limit of the interval. 
D) located at the midpoint of the interval.

Question 19

If the scores of an even number of cases are arranged from high to low,the median is

Accepted Answer

A) the middle score. 
B) the average of the two middle scores. 
C) the average of the highest and lowest scores. 
D) the same as the mode. 
A) the middle score. 
B) the average of the two middle scores. 
C) the average of the highest and lowest scores. 
D) the same as the mode.

Question 20

The expression S(Xi)directs us to find the

Accepted Answer

A) average of the scores. 
B) middle score. 
C) sum of the scores. 
D) median. 
A) average of the scores. 
B) middle score. 
C) sum of the scores. 
D) median.

The mode measures "central tendency" in terms of the most

The mean defines "central tendency" in terms of the

Which of the following correctly matches the level of measurement of a variable with the preferred measure of central tendency?

The purpose of measures of central tendency is to describe what value of a distribution of scores is

To compute a median for scores that have been grouped into a frequency distribution,we assume that the scores in each interval are

Deciles,quartiles,and percentiles divide a distribution of scores into,respectively,

To locate the 6th decile,we would first multiply the number of cases (N)by

A researcher is preparing a report and wants to select a measure of central tendency that shows the most common score in a particular distribution.Which statistic should she select?

Which measure of central tendency is affected by every score in the distribution?

If the scores on a variable are 11,14,18,20,and 25,the median is

An instructor is preparing a report showing mid-semester grades and notes that the mean,median,and mode are all exactly 76.00.What can she conclude?

If you changed ONLY the highest score in a distribution of 5 scores,which of the following measure of central tendency would be affected?

You have come across some statistics regarding the average cost of new housing in your city and a nearby city over the past few years.Write a paragraph summarizing these statistics. City A City B 1990 2000 1990 2000 MeanCost 77,000 127,000 80,000 152,000 MedianCost 72,000 110,000 79,000 121,000

It is possible for a variable to have

The fourth decile would be at the same location as

The most appropriate measure of central tendency for the variable age (measured in years)would be the

If you subtracted the mean from each score in a distribution and added the results,the sum would be

To compute a mean for scores that have been grouped into a frequency distribution,we assume that the scores in each interval are

If the scores of an even number of cases are arranged from high to low,the median is

The expression S(X_i)directs us to find the

Introduction

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

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

Association Between Variables Measured at the Interval-Ratio Level

Elaborating Bivariate Tables

Partial Correlation and Multiple Regression and Correlation

Filters

Exam 3: Measures of Central Tendency

The mode measures "central tendency" in terms of the most

The mean defines "central tendency" in terms of the

Which of the following correctly matches the level of measurement of a variable with the preferred measure of central tendency?

The purpose of measures of central tendency is to describe what value of a distribution of scores is

To compute a median for scores that have been grouped into a frequency distribution,we assume that the scores in each interval are

Deciles,quartiles,and percentiles divide a distribution of scores into,respectively,

To locate the 6th decile,we would first multiply the number of cases (N)by

A researcher is preparing a report and wants to select a measure of central tendency that shows the most common score in a particular distribution.Which statistic should she select?

Which measure of central tendency is affected by every score in the distribution?

If the scores on a variable are 11,14,18,20,and 25,the median is

An instructor is preparing a report showing mid-semester grades and notes that the mean,median,and mode are all exactly 76.00.What can she conclude?

If you changed ONLY the highest score in a distribution of 5 scores,which of the following measure of central tendency would be affected?

You have come across some statistics regarding the average cost of new housing in your city and a nearby city over the past few years.Write a paragraph summarizing these statistics. City A City B 1990 2000 1990 2000 MeanCost 77,000 127,000 80,000 152,000 MedianCost 72,000 110,000 79,000 121,000

It is possible for a variable to have

The fourth decile would be at the same location as

The most appropriate measure of central tendency for the variable age (measured in years)would be the

If you subtracted the mean from each score in a distribution and added the results,the sum would be

To compute a mean for scores that have been grouped into a frequency distribution,we assume that the scores in each interval are

If the scores of an even number of cases are arranged from high to low,the median is

The expression S(Xi)directs us to find the

Introduction

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

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

Association Between Variables Measured at the Interval-Ratio Level

Elaborating Bivariate Tables

Partial Correlation and Multiple Regression and Correlation

Filters

The expression S(X_i)directs us to find the