Question 1

Across all individuals,scores will always be closest to the mode than any other index of central tendency.

Accepted Answer

A) True 
 B)False

Question 2

Explain why the mean is not an optimal measure of central tendency when there are one or more extreme scores in the distribution.

Accepted Answer

In general,when there are one or more ex

Question 3

Consider the following scores achieved by subjects taking a standard IQ test: 68,83,93,100,101,103,106,120.The mode is ______.

Accepted Answer

A) 93 
B) 101 
C) 97.88 
D) none of these 
A) 93 
B) 101 
C) 97.88 
D) none of these

Question 4

Given the data set 8,8,8,7,5,6,2,2,what is the range?

Accepted Answer

A) 8 
B) 2 
C) 5.75 
D) 6 
A) 8 
B) 2 
C) 5.75 
D) 6

Question 5

The sum of squared deviations from the mean will always be greater than the sum of squared deviations around any other index of central tendency.

Accepted Answer

A) True 
 B)False

Question 6

If a researcher were to subtract the mean of a distribution from each score in that distribution and add the differences,the resulting value would _____.

Accepted Answer

A) be equal to the median 
B) always be zero 
C) be greater than the mode 
D) depend upon the scores that make up the distribution 
A) be equal to the median 
B) always be zero 
C) be greater than the mode 
D) depend upon the scores that make up the distribution

Question 7

As a measure of central tendency,the median _____ the absolute difference between it and the scores in the distribution.

Accepted Answer

A) minimizes 
B) maximizes 
C) summarizes 
D) none of these 
A) minimizes 
B) maximizes 
C) summarizes 
D) none of these

Question 8

A teacher wants to determine the mean score of students taking a newly developed test.Her students scored as follows: 40,45,60,65,70,70,70,80,90,100.Compute the mean for the class.

Accepted Answer

A) 69 
B) 70 
C) 69.5 
D) none of these 
A) 69 
B) 70 
C) 69.5 
D) none of these

Question 9

For the following set of scores compute the mean,mode,sum of squares,variance and standard deviation: 30 32 34 40 50 45 46 47

Accepted Answer

Mean=324/8=40.5 SS=3

Question 10

If you were to randomly select one score from a set of scores,the score most likely to be selected _______.

Accepted Answer

A) would be equal to the medium of the set of scores 
B) would be equal to the mode of the set of scores 
C) would be equal to the mean of the set of scores 
D) can vary with the numerical values of the individual scores 
A) would be equal to the medium of the set of scores 
B) would be equal to the mode of the set of scores 
C) would be equal to the mean of the set of scores 
D) can vary with the numerical values of the individual scores

Question 11

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 12

If the variance of a distribution is 100 the SD is____________________.

Accepted Answer

The answer of If the variance of a distribution is...

Question 13

If we were to randomly select one score from a set of scores,the value of that score
would most likely be equal to the mode as opposed to any other value.

Accepted Answer

A) True 
 B)False

Question 14

What does the variability of a set of scores refer to?

Accepted Answer

The variability of t

Question 15

The formula for computing the median is based on the assumption that the median occurs within the real limits of the middle score(s).

Accepted Answer

A) True 
 B)False

Question 16

_____ 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

Question 17

Fill in the following table.
   
What is the median of the distribution or 50th percentile?

Accepted Answer

Question 18

The variability of a set of scores reflects its skewness.

Accepted Answer

A) True 
 B)False

Question 19

The term "central tendency" refers to _____.

Accepted Answer

A) an average 
B) a score around which other scores tend to cluster 
C) both a and b 
D) neither a nor b 
A) an average 
B) a score around which other scores tend to cluster 
C) both a and b 
D) neither a nor b

Question 20

The interquartile range is the difference between the highest and lowest scores after the top 75% of the scores and the bottom 75% of the scores have been eliminated from the data.

Accepted Answer

A) True 
 B)False

Across all individuals,scores will always be closest to the mode than any other index of central tendency.

Explain why the mean is not an optimal measure of central tendency when there are one or more extreme scores in the distribution.

Consider the following scores achieved by subjects taking a standard IQ test: 68,83,93,100,101,103,106,120.The mode is ______.

Given the data set 8,8,8,7,5,6,2,2,what is the range?

The sum of squared deviations from the mean will always be greater than the sum of squared deviations around any other index of central tendency.

If a researcher were to subtract the mean of a distribution from each score in that distribution and add the differences,the resulting value would _____.

As a measure of central tendency,the median _____ the absolute difference between it and the scores in the distribution.

A teacher wants to determine the mean score of students taking a newly developed test.Her students scored as follows: 40,45,60,65,70,70,70,80,90,100.Compute the mean for the class.

For the following set of scores compute the mean,mode,sum of squares,variance and standard deviation: 30 32 34 40 50 45 46 47

If you were to randomly select one score from a set of scores,the score most likely to be selected _______.

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

If the variance of a distribution is 100 the SD is____________________.

If we were to randomly select one score from a set of scores,the value of that score would most likely be equal to the mode as opposed to any other value.

What does the variability of a set of scores refer to?

The formula for computing the median is based on the assumption that the median occurs within the real limits of the middle score(s).

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

Fill in the following table. What is the median of the distribution or 50^th percentile?

The variability of a set of scores reflects its skewness.

The term "central tendency" refers to _____.

The interquartile range is the difference between the highest and lowest scores after the top 75% of the scores and the bottom 75% of the scores have been eliminated from the data.

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

Across all individuals,scores will always be closest to the mode than any other index of central tendency.

Explain why the mean is not an optimal measure of central tendency when there are one or more extreme scores in the distribution.

Consider the following scores achieved by subjects taking a standard IQ test: 68,83,93,100,101,103,106,120.The mode is ______.

Given the data set 8,8,8,7,5,6,2,2,what is the range?

The sum of squared deviations from the mean will always be greater than the sum of squared deviations around any other index of central tendency.

If a researcher were to subtract the mean of a distribution from each score in that distribution and add the differences,the resulting value would _____.

As a measure of central tendency,the median _____ the absolute difference between it and the scores in the distribution.

A teacher wants to determine the mean score of students taking a newly developed test.Her students scored as follows: 40,45,60,65,70,70,70,80,90,100.Compute the mean for the class.

For the following set of scores compute the mean,mode,sum of squares,variance and standard deviation: 30 32 34 40 50 45 46 47

If you were to randomly select one score from a set of scores,the score most likely to be selected _______.

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

If the variance of a distribution is 100 the SD is____________________.

If we were to randomly select one score from a set of scores,the value of that score would most likely be equal to the mode as opposed to any other value.

What does the variability of a set of scores refer to?

The formula for computing the median is based on the assumption that the median occurs within the real limits of the middle score(s).

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

Fill in the following table. What is the median of the distribution or 50th percentile?

The variability of a set of scores reflects its skewness.

The term "central tendency" refers to _____.

The interquartile range is the difference between the highest and lowest scores after the top 75% of the scores and the bottom 75% of the scores have been eliminated from the data.

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

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

Fill in the following table. What is the median of the distribution or 50^th percentile?