Question 1

In a normal distribution,the _____.

Accepted Answer

A) mean is usually higher than the mode 
B) median is usually lower than the mean 
C) mean,median,and mode might be equal 
D) mean,median,and mode are always equal 
A) mean is usually higher than the mode 
B) median is usually lower than the mean 
C) mean,median,and mode might be equal 
D) mean,median,and mode are always equal D

Question 2

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 B

Question 3

The symbol for true population is_____.

Accepted Answer

A) µ 
B)    
C) á 
D) None of these 
A) µ 
B)    
C) á 
D) None of these A

Question 4

The standard deviation is the most easily interpreted measure of variability because it

Accepted Answer

A) does not include extreme scores. 
B) is measured in square units. 
C) is in the original unit of measurement. 
D) is usually a number larger than the variance. 
A) does not include extreme scores. 
B) is measured in square units. 
C) is in the original unit of measurement. 
D) is usually a number larger than the variance.

Question 5

What type of graph uses medians and interquartile ranges rather than means and standard deviations ____________________.

Accepted Answer

The answer of What type of graph uses medians and...

Question 6

A distribution that has a mean of 10 SD of 5 is much more_____than a distribution with a mean of 10 and SD of 2.

Accepted Answer

A) leptokurtic 
B) platykurtic 
C) skewed 
D) None of these 
A) leptokurtic 
B) platykurtic 
C) skewed 
D) None of these

Question 7

The variance is the:

Accepted Answer

A) sum of squares divided by N 
B) the average squared deviation from the mean 
C) a and b 
D) neither a nor b 
A) sum of squares divided by N 
B) the average squared deviation from the mean 
C) a and b 
D) neither a nor b

Question 8

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

Accepted Answer

Kurtosis refers to the flatness or peake

Question 9

The mean maximizes the sum of signed deviations.

Accepted Answer

A) True 
 B)False

Question 10

SS is the _____.

Accepted Answer

A) sum of standard scores 
B) sum of squared deviations from the mean 
C) sum of standard deviations from the mean 
D) sum of standard deviations from the median 
A) sum of standard scores 
B) sum of squared deviations from the mean 
C) sum of standard deviations from the mean 
D) sum of standard deviations from the median

Question 11

When there are duplications of the middle score(s),the median is simply the middle score.

Accepted Answer

A) True 
 B)False

Question 12

The standard deviation represents an average deviation from the mean.

Accepted Answer

A) True 
 B)False

Question 13

Distributions of scores can have:

Accepted Answer

A) identical variabilities but very different central tendencies 
B) identical central tendencies but very different variabilities 
C) a and b 
D) neither a nor b 
A) identical variabilities but very different central tendencies 
B) identical central tendencies but very different variabilities 
C) a and b 
D) neither a nor b

Question 14

Ideally,when trying to characterize a set of scores,it is useful to report all three indices of central tendency.

Accepted Answer

A) True 
 B)False

Question 15

Dr.Qui found his test scores to be as follows 60,92,75,79,75,and 90.What is the range of the test scores?

Accepted Answer

A) 30 
B) 32 
C) 75 
D) None of these 
A) 30 
B) 32 
C) 75 
D) None of these

Question 16

The symbol used for the population variance is _____ and the symbol used for the population standard deviation is _____.

Accepted Answer

A) s;s2 
B) s,s 
C) s2;s2 
D) s2;s 
A) s;s2 
B) s,s 
C) s2;s2 
D) s2;s

Question 17

The range indicates the

Accepted Answer

A) average distance from the median. 
B) distance between the highest and lowest scores. 
C) average variability among all of the scores. 
A) average distance from the median. 
B) distance between the highest and lowest scores. 
C) average variability among all of the scores.

Question 18

The mean relative to the median determines if the distribution is____________________.

Accepted Answer

The answer of The mean relative to the median determines...

Question 19

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

The answer of The mean for class A's exam was...

Question 20

Briefly define the median and describe the three different approaches to its computation.

Accepted Answer

The median is the point in the distribut

In a normal distribution,the _____.

The mean of a _skewed distribution will always be _than the median.

The symbol for true population is_____.

The standard deviation is the most easily interpreted measure of variability because it

What type of graph uses medians and interquartile ranges rather than means and standard deviations ____________________.

A distribution that has a mean of 10 SD of 5 is much more_____than a distribution with a mean of 10 and SD of 2.

The variance is the:

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

The mean maximizes the sum of signed deviations.

SS is the _____.

When there are duplications of the middle score(s),the median is simply the middle score.

The standard deviation represents an average deviation from the mean.

Distributions of scores can have:

Ideally,when trying to characterize a set of scores,it is useful to report all three indices of central tendency.

Dr.Qui found his test scores to be as follows 60,92,75,79,75,and 90.What is the range of the test scores?

The symbol used for the population variance is _ and the symbol used for the population standard deviation is _.

The range indicates the

The mean relative to the median determines if the distribution is____________________.

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.

Briefly define the median and describe the three different approaches to its computation.

Introduction and Mathematical Preliminaries

Frequency and Probability Distributions

Percentiles percentile Ranks standard Scores and the Normal Distribution

Pearson Correlation and Regression: Descriptive Aspects

Estimation and Sampling Distributions

Hypothesis Testing: Inferences About a Single Mean

Probability

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

In a normal distribution,the _____.

The mean of a _____skewed distribution will always be _____than the median.

The symbol for true population is_____.

The standard deviation is the most easily interpreted measure of variability because it

What type of graph uses medians and interquartile ranges rather than means and standard deviations ____________________.

A distribution that has a mean of 10 SD of 5 is much more_____than a distribution with a mean of 10 and SD of 2.

The variance is the:

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

The mean maximizes the sum of signed deviations.

SS is the _____.

When there are duplications of the middle score(s),the median is simply the middle score.

The standard deviation represents an average deviation from the mean.

Distributions of scores can have:

Ideally,when trying to characterize a set of scores,it is useful to report all three indices of central tendency.

Dr.Qui found his test scores to be as follows 60,92,75,79,75,and 90.What is the range of the test scores?

The symbol used for the population variance is _____ and the symbol used for the population standard deviation is _____.

The range indicates the

The mean relative to the median determines if the distribution is____________________.

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.

Briefly define the median and describe the three different approaches to its computation.

Introduction and Mathematical Preliminaries

Frequency and Probability Distributions

Percentiles percentile Ranks standard Scores and the Normal Distribution

Pearson Correlation and Regression: Descriptive Aspects

Estimation and Sampling Distributions

Hypothesis Testing: Inferences About a Single Mean

Probability

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

The mean of a _skewed distribution will always be _than the median.

The symbol used for the population variance is _ and the symbol used for the population standard deviation is _.