Question 1

Measures of central tendency are measures of

Accepted Answer

A) deviations. 
B) location. 
C) distance. 
D) extremes. 
A) deviations. 
B) location. 
C) distance. 
D) extremes. B

Question 2

The mean for class A's exam was 76 and the SD is 4.The mean for class B's exam was 78 and the SD is 8.Class ____________________has more variance on the exam.

Accepted Answer

B

Question 3

_____ refer(s)to the tendency for scores to cluster on one side of the mean in some distributions.

Accepted Answer

A) Unbalancing 
B) Skewness 
C) Both a and b 
D) Neither a nor b 
A) Unbalancing 
B) Skewness 
C) Both a and b 
D) Neither a nor b B

Question 4

Define kurtosis and describe what is meant by platykurtic and leptokurtic distributions.

Accepted Answer

Kurtosis refers to the flatness or peake

Question 5

When presenting measures of central tendency and variability,most researchers report _____ and_____ ,which are the most _____ descriptive statistics.

Accepted Answer

A) means;standard deviations;frequently used 
B) means;standard deviations;precisely defined 
C) means;standard deviations;generally accurate 
D) none of these 
A) means;standard deviations;frequently used 
B) means;standard deviations;precisely defined 
C) means;standard deviations;generally accurate 
D) none of these

Question 6

The _____ is the highest score minus the lowest score.

Accepted Answer

A) variance 
B) standard deviation 
C) interquartile range 
D) range 
A) variance 
B) standard deviation 
C) interquartile range 
D) range

Question 7

The range is a good measure of variability because it takes extreme scores into account.

Accepted Answer

A) True 
 B)False

Question 8

The concepts of median and mean are meaningless for qualitative variables.

Accepted Answer

A) True 
 B)False

Question 9

The _____ is the point in the distribution of scores that divides the distribution into two equal parts.

Accepted Answer

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

Question 10

If a distribution is less peaked than another,it is said to be more _____;if it is more peaked than another,it is said to be more_____.

Accepted Answer

A) skewed;variable 
B) leptokurtic;variable 
C) platykurtic;leptokurtic 
D) leptokurtic;platykurtic 
A) skewed;variable 
B) leptokurtic;variable 
C) platykurtic;leptokurtic 
D) leptokurtic;platykurtic

Question 11

The mean of a _____ skewed distribution will always be _____ than the median.

Accepted Answer

A) positively;less 
B) negatively;less 
C) negatively;greater 
D) normal;less 
A) positively;less 
B) negatively;less 
C) negatively;greater 
D) normal;less

Question 12

What measures are used to determine the amount of variability that occurs in a data set?

Accepted Answer

A) Variance 
B) Standard Deviation 
C) Mean 
D) Both Variance and Standard Deviation 
E) All of these 
A) Variance 
B) Standard Deviation 
C) Mean 
D) Both Variance and Standard Deviation 
E) All of these

Question 13

Which of the following statements is true of the mode of any set of scores?

Accepted Answer

A) It is the score which occurs most frequently. 
B) It is always less than the mean. 
C) Both a and b. 
D) Neither a nor b. 
A) It is the score which occurs most frequently. 
B) It is always less than the mean. 
C) Both a and b. 
D) Neither a nor b.

Question 14

When there is an odd number of scores,the median

Accepted Answer

A) is the arithmetic average of the middle two scores. 
B) is the middle score. 
C) occurs within the real limits of the middle score(s)when there are duplications of the middle score(s). 
D) both a and c 
E) both b and c 
A) is the arithmetic average of the middle two scores. 
B) is the middle score. 
C) occurs within the real limits of the middle score(s)when there are duplications of the middle score(s). 
D) both a and c 
E) both b and c

Question 15

_____refer(s)to the tendency for scores to cluster on one side of the mean in some distributions.

Accepted Answer

A) Unbalancing 
B) Skewness 
C) Kurtosis 
D) Both skewness and kurtosis 
E) None of these 
A) Unbalancing 
B) Skewness 
C) Kurtosis 
D) Both skewness and kurtosis 
E) None of these

Question 16

Most scores in negatively skewed distributions occur below the mean and only a relatively few extreme scores occur above it.

Accepted Answer

A) True 
 B)False

Question 17

The range is the highest score minus the lowest score.

Accepted Answer

A) True 
 B)False

Question 18

Most of the inferential statistics used by behavioral scientists make use of the _____ as a measure of central tendency.

Accepted Answer

A) mean 
B) median 
C) mode 
D) all are used with equal frequency 
A) mean 
B) median 
C) mode 
D) all are used with equal frequency

Question 19

The standard deviation is the:

Accepted Answer

A) square root of the sum of squares 
B) positive square root of the variance 
C) negative square root of the variance 
D) sum of squares divided by N 
A) square root of the sum of squares 
B) positive square root of the variance 
C) negative square root of the variance 
D) sum of squares divided by N

Question 20

Compute the median of the following set of scores: 106,106,109,110,113,121,121.

Accepted Answer

A) 109.5 
B) 110 
C) 106 and 121 
D) cannot be determined from information given 
A) 109.5 
B) 110 
C) 106 and 121 
D) cannot be determined from information given

Measures of central tendency are measures of

The mean for class A's exam was 76 and the SD is 4.The mean for class B's exam was 78 and the SD is 8.Class ____________________has more variance on the exam.

_____ refer(s)to the tendency for scores to cluster on one side of the mean in some distributions.

Define kurtosis and describe what is meant by platykurtic and leptokurtic distributions.

When presenting measures of central tendency and variability,most researchers report ___ and_ ,which are the most ___ descriptive statistics.

The _____ is the highest score minus the lowest score.

The range is a good measure of variability because it takes extreme scores into account.

The concepts of median and mean are meaningless for qualitative variables.

The _____ is the point in the distribution of scores that divides the distribution into two equal parts.

If a distribution is less peaked than another,it is said to be more _;if it is more peaked than another,it is said to be more_.

The mean of a _ skewed distribution will always be _ than the median.

What measures are used to determine the amount of variability that occurs in a data set?

Which of the following statements is true of the mode of any set of scores?

When there is an odd number of scores,the median

_____refer(s)to the tendency for scores to cluster on one side of the mean in some distributions.

Most scores in negatively skewed distributions occur below the mean and only a relatively few extreme scores occur above it.

The range is the highest score minus the lowest score.

Most of the inferential statistics used by behavioral scientists make use of the _____ as a measure of central tendency.

The standard deviation is the:

Compute the median of the following set of scores: 106,106,109,110,113,121,121.

Introduction and Mathematical Preliminaries

Frequency and Probability Distributions

Percentiles,percentile Ranks,standard Scores,and the Normal Distribution

Pearson Correlation and Regression: Descriptive Aspects

Probability

Estimation and Sampling Distributions

Hypothesis Testing: Inferences About a Single Mean

Principles of Research Design and Statistical Preliminaries for Analyzing Bivariate Relationships

Independent Groups T-Test

Correlated Groups T-Test

One-Way Repeated Measures Analysis of Variance

Pearson Correlation and Regression: Inferential Aspects

Chi-Square Test

Nonparametric Statistics

Two-Way Between-Subjects Analysis of Variance

Overview and Extension: Statistical Tests for More Complex Designs

Filters

Exam 3: Measures of Central Tendency and Variability

Measures of central tendency are measures of

The mean for class A's exam was 76 and the SD is 4.The mean for class B's exam was 78 and the SD is 8.Class ____________________has more variance on the exam.

_____ refer(s)to the tendency for scores to cluster on one side of the mean in some distributions.

Define kurtosis and describe what is meant by platykurtic and leptokurtic distributions.

When presenting measures of central tendency and variability,most researchers report _____ and_____ ,which are the most _____ descriptive statistics.

The _____ is the highest score minus the lowest score.

The range is a good measure of variability because it takes extreme scores into account.

The concepts of median and mean are meaningless for qualitative variables.

The _____ is the point in the distribution of scores that divides the distribution into two equal parts.

If a distribution is less peaked than another,it is said to be more _____;if it is more peaked than another,it is said to be more_____.

The mean of a _____ skewed distribution will always be _____ than the median.

What measures are used to determine the amount of variability that occurs in a data set?

Which of the following statements is true of the mode of any set of scores?

When there is an odd number of scores,the median

_____refer(s)to the tendency for scores to cluster on one side of the mean in some distributions.

Most scores in negatively skewed distributions occur below the mean and only a relatively few extreme scores occur above it.

The range is the highest score minus the lowest score.

Most of the inferential statistics used by behavioral scientists make use of the _____ as a measure of central tendency.

The standard deviation is the:

Compute the median of the following set of scores: 106,106,109,110,113,121,121.

Introduction and Mathematical Preliminaries

Frequency and Probability Distributions

Percentiles,percentile Ranks,standard Scores,and the Normal Distribution

Pearson Correlation and Regression: Descriptive Aspects

Probability

Estimation and Sampling Distributions

Hypothesis Testing: Inferences About a Single Mean

Principles of Research Design and Statistical Preliminaries for Analyzing Bivariate Relationships

Independent Groups T-Test

Correlated Groups T-Test

One-Way Repeated Measures Analysis of Variance

Pearson Correlation and Regression: Inferential Aspects

Chi-Square Test

Nonparametric Statistics

Two-Way Between-Subjects Analysis of Variance

Overview and Extension: Statistical Tests for More Complex Designs

Filters

When presenting measures of central tendency and variability,most researchers report ___ and_ ,which are the most ___ descriptive statistics.

If a distribution is less peaked than another,it is said to be more _;if it is more peaked than another,it is said to be more_.

The mean of a _ skewed distribution will always be _ than the median.