Question 1

How does the standardization of a set of scores affect the basic shape of the distribution?

Accepted Answer

The process of standardizing scores does not change the basic shape of the distribution.Standardization affects the central tendency and the variability of the scores,but not the skewness or kurtosis of the scores.

Question 2

T scores are directly analogous to standard scores,but instead of having a mean of 0 and a standard deviation of 1.00,they have a mean of 50.00 and a standard deviation of 10.00.

Accepted Answer

A) True 
 B)False  True

Question 3

In what sense are percentile ranks and standard scores similar to each other?

Accepted Answer

Percentile ranks and standard scores are measures used to identify the location of a specified score within a set of scores.They represent an individual's performance on some variable relative to some group of individuals.They do not convey performance in an absolute sense.

Question 4

The number of standard deviation units that a score falls above or below the mean is represented by the _____.

Accepted Answer

A) median frequency 
B) percentile rank 
C) relative frequency 
D) standard score 
A) median frequency 
B) percentile rank 
C) relative frequency 
D) standard score

Question 5

The percentage of scores in the distribution that occur at or below a given value,X,is the _____ of that value.

Accepted Answer

A) standard score 
B) percentile rank 
C) percentile 
D) rank 
A) standard score 
B) percentile rank 
C) percentile 
D) rank

Question 6

It is always the case that _____ of the scores in a normal distribution occur above the mean and _____ of the scores in a normal distribution occur below the mean.

Accepted Answer

A) .50;.50 
B) .75;.25 
C) all;none 
D) .25;.75 
A) .50;.50 
B) .75;.25 
C) all;none 
D) .25;.75

Question 7

The number of standard deviation units that a score falls above or below the mean is represented by the _____.

Accepted Answer

A) median frequency 
B) percentile rank 
C) relative frequency 
D) standard score 
A) median frequency 
B) percentile rank 
C) relative frequency 
D) standard score

Question 8

In a normal distribution,over 99% of all scores fall between standard scores of -3 and +3.

Accepted Answer

A) True 
 B)False

Question 9

If your professor tells you that the mean of the class was 70 and the standard deviation was 2 what is the variance?

Accepted Answer

A) 6 
B) 8 
C) 4 
D) Cannot be determined 
A) 6 
B) 8 
C) 4 
D) Cannot be determined

Question 10

A set of scores that is positively skewed will become normally distributed after they have been converted to standard scores.

Accepted Answer

A) True 
 B)False

Question 11

List four characteristics shared by all normal distributions.

Accepted Answer

All normal distributions are symmetrical

Question 12

A set of scores that is platykurtic will still be platykurtic after they have been converted to standard scores.

Accepted Answer

A) True 
 B)False

Question 13

The scores below represent the results of an in-class quiz worth 10 points.
What is the cumulative frequency associated with a score of 6?

Accepted Answer

A) 2 
B) 5 
C) 7 
D) 13 
A) 2 
B) 5 
C) 7 
D) 13

Question 14

The mean of a set of standard scores for a given distribution is _____.

Accepted Answer

A) 100 
B) 50 
C) 1 
D) 0 
A) 100 
B) 50 
C) 1 
D) 0

Question 15

Percentiles are used in standardized testing such as the SAT.

Accepted Answer

A) True 
 B)False

Question 16

An instructor has given his final exam,and scores are approximately normally distributed.Nancy scores a 90 and Ronald scores a 75.The characteristics of the distribution are as follows:
= 85,s2 = 36.What is Nancy's z score?

Accepted Answer

A) .14 
B) -.14 
C) .83 
D) -.83 
A) .14 
B) -.14 
C) .83 
D) -.83

Question 17

Based on the Applications to the Analysis of Social Problems section of Chapter 4,a variant of the standard scores formula may be calculated using the _____ and _____ instead of the mean and standard deviation,respectively.

Accepted Answer

A) median;range 
B) median;median of absolute deviations 
C) mode;interquartile range 
D) mode;variance 
A) median;range 
B) median;median of absolute deviations 
C) mode;interquartile range 
D) mode;variance

Question 18

The score value corresponding to a given percentile rank is referred to as a _____.

Accepted Answer

A) z-score 
B) percentage 
C) percentile 
D) none of these 
A) z-score 
B) percentage 
C) percentile 
D) none of these

Question 19

If your boss wants you to compare how well your company is doing compared to another company in customer Satisfaction and you scored a 90 and your competitor a 88 can you really say your customers are more satisfied?

Accepted Answer

A) Yes 
B) No,the mean of the distributions needs to be determined 
C) No,the SD of the distributions needs to be determined 
D) Both b & c 
A) Yes 
B) No,the mean of the distributions needs to be determined 
C) No,the SD of the distributions needs to be determined 
D) Both b & c

Question 20

In a normal distribution,approximately _____ of all scores fall between standard scores of -3 and +3.

Accepted Answer

A) 50% 
B) 68% 
C) 95% 
D) 99% 
A) 50% 
B) 68% 
C) 95% 
D) 99%

How does the standardization of a set of scores affect the basic shape of the distribution?

T scores are directly analogous to standard scores,but instead of having a mean of 0 and a standard deviation of 1.00,they have a mean of 50.00 and a standard deviation of 10.00.

In what sense are percentile ranks and standard scores similar to each other?

The number of standard deviation units that a score falls above or below the mean is represented by the _____.

The percentage of scores in the distribution that occur at or below a given value,X,is the _____ of that value.

It is always the case that _ of the scores in a normal distribution occur above the mean and _ of the scores in a normal distribution occur below the mean.

The number of standard deviation units that a score falls above or below the mean is represented by the _____.

In a normal distribution,over 99% of all scores fall between standard scores of -3 and +3.

If your professor tells you that the mean of the class was 70 and the standard deviation was 2 what is the variance?

A set of scores that is positively skewed will become normally distributed after they have been converted to standard scores.

List four characteristics shared by all normal distributions.

A set of scores that is platykurtic will still be platykurtic after they have been converted to standard scores.

The scores below represent the results of an in-class quiz worth 10 points. What is the cumulative frequency associated with a score of 6?

The mean of a set of standard scores for a given distribution is _____.

Percentiles are used in standardized testing such as the SAT.

An instructor has given his final exam,and scores are approximately normally distributed.Nancy scores a 90 and Ronald scores a 75.The characteristics of the distribution are as follows: = 85,s² = 36.What is Nancy's z score?

Based on the Applications to the Analysis of Social Problems section of Chapter 4,a variant of the standard scores formula may be calculated using the _ and _ instead of the mean and standard deviation,respectively.

The score value corresponding to a given percentile rank is referred to as a _____.

If your boss wants you to compare how well your company is doing compared to another company in customer Satisfaction and you scored a 90 and your competitor a 88 can you really say your customers are more satisfied?

In a normal distribution,approximately _____ of all scores fall between standard scores of -3 and +3.

Introduction and Mathematical Preliminaries

Frequency and Probability Distributions

Pearson Correlation and Regression: Descriptive Aspects

Measures of Central Tendency and Variability

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 4: Percentiles percentile Ranks standard Scores and the Normal Distribution

How does the standardization of a set of scores affect the basic shape of the distribution?

T scores are directly analogous to standard scores,but instead of having a mean of 0 and a standard deviation of 1.00,they have a mean of 50.00 and a standard deviation of 10.00.

In what sense are percentile ranks and standard scores similar to each other?

The number of standard deviation units that a score falls above or below the mean is represented by the _____.

The percentage of scores in the distribution that occur at or below a given value,X,is the _____ of that value.

It is always the case that _____ of the scores in a normal distribution occur above the mean and _____ of the scores in a normal distribution occur below the mean.

The number of standard deviation units that a score falls above or below the mean is represented by the _____.

In a normal distribution,over 99% of all scores fall between standard scores of -3 and +3.

If your professor tells you that the mean of the class was 70 and the standard deviation was 2 what is the variance?

A set of scores that is positively skewed will become normally distributed after they have been converted to standard scores.

List four characteristics shared by all normal distributions.

A set of scores that is platykurtic will still be platykurtic after they have been converted to standard scores.

The scores below represent the results of an in-class quiz worth 10 points. What is the cumulative frequency associated with a score of 6?

The mean of a set of standard scores for a given distribution is _____.

Percentiles are used in standardized testing such as the SAT.

An instructor has given his final exam,and scores are approximately normally distributed.Nancy scores a 90 and Ronald scores a 75.The characteristics of the distribution are as follows: = 85,s2 = 36.What is Nancy's z score?

Based on the Applications to the Analysis of Social Problems section of Chapter 4,a variant of the standard scores formula may be calculated using the _____ and _____ instead of the mean and standard deviation,respectively.

The score value corresponding to a given percentile rank is referred to as a _____.

If your boss wants you to compare how well your company is doing compared to another company in customer Satisfaction and you scored a 90 and your competitor a 88 can you really say your customers are more satisfied?

In a normal distribution,approximately _____ of all scores fall between standard scores of -3 and +3.

Introduction and Mathematical Preliminaries

Frequency and Probability Distributions

Pearson Correlation and Regression: Descriptive Aspects

Measures of Central Tendency and Variability

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

It is always the case that _ of the scores in a normal distribution occur above the mean and _ of the scores in a normal distribution occur below the mean.

An instructor has given his final exam,and scores are approximately normally distributed.Nancy scores a 90 and Ronald scores a 75.The characteristics of the distribution are as follows: = 85,s² = 36.What is Nancy's z score?

Based on the Applications to the Analysis of Social Problems section of Chapter 4,a variant of the standard scores formula may be calculated using the _ and _ instead of the mean and standard deviation,respectively.