Question 1

Given a normal distribution of test scores with
= 80,s2 = 49,what is the z score corresponding to a test score of 70?

Accepted Answer

A) -1.43 
B) 1.43 
C) -2.1 
D) 22 
A) -1.43 
B) 1.43 
C) -2.1 
D) 22

Question 2

The percentile rank of a score is the same as a percentile.

Accepted Answer

A) True 
 B)False

Question 3

What proportion of scores in a normal distribution lies between z scores of -1.55and +1.55?

Accepted Answer

A) .8788 
B) .9802 
C) .8779 
D) None of these 
A) .8788 
B) .9802 
C) .8779 
D) None of these

Question 4

IQ test are based on a normal distribution.If someone's Standard score is 0 what is his IQ?

Accepted Answer

A) 100 
B) 130 
C) 50 
D) None of these 
A) 100 
B) 130 
C) 50 
D) None of these

Question 5

The _____ of a set of standard scores is always equal to 0.

Accepted Answer

A) standard deviation 
B) mean 
C) sum 
D) mean and sum 
A) standard deviation 
B) mean 
C) sum 
D) mean and sum

Question 6

What proportion of scores in a normal distribution are above z = 1.96 and below z = -2.17?

Accepted Answer

A) .0400 
B) .0150 
C) .0250 
D) .9600 
A) .0400 
B) .0150 
C) .0250 
D) .9600

Question 7

A standard score represents the number of standard deviation units that a score falls above or below the mean.

Accepted Answer

A) True 
 B)False

Question 8

What are some of the advantages of standard scores over percentile ranks?

Accepted Answer

A percentile rank reflects only an ordin

Question 9

For a T score with a mean of 50 and a standard deviation of 10,the T score equivalent to a standard score of 2.5 is _____.

Accepted Answer

A) 2.5 
B) 52.5 
C) 3.5 
D) 75 
A) 2.5 
B) 52.5 
C) 3.5 
D) 75

Question 10

A psychologist is interested in how well people can remember words that they had previously seen.He gives them a list of 70 words,but does not tell them they will be tested later.One week later the students are given a list of 140 words,and told to choose the ones they had seen the previous week.Below is the grouped distribution of the number of words remembered by the subjects.
What is the score at the 50th percentile?

Accepted Answer

A) 20 
B) 22 
C) 23 
D) 37 
A) 20 
B) 22 
C) 23 
D) 37

Question 11

Julie took the same psychology exam as John and received a score of 65 what is her standard score?

Accepted Answer

A) 2.5 
B) -2.5 
C) .625 
D) -.625 
A) 2.5 
B) -2.5 
C) .625 
D) -.625

Question 12

A negative standard score indicates that the original score is less than the mean.

Accepted Answer

A) True 
 B)False

Question 13

When comparing to scores from different distributions you should convert them into a Standard Distribution.

Accepted Answer

A) True 
 B)False

Question 14

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 approximate percentile rank?

Accepted Answer

A) 59 
B) 30 
C) 41 
D) 80 
A) 59 
B) 30 
C) 41 
D) 80

Question 15

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 T score (for a mean of 50 and a standard deviation of 10)?

Accepted Answer

A) 51.4 
B) 5.14 
C) 5.83 
D) 58.3 
A) 51.4 
B) 5.14 
C) 5.83 
D) 58.3

Question 16

John scored an 85 on his most recent psychology exam.Which of the following distributions would John least prefer (assuming he wishes to perform as well as possible,and higher test scores are more favorable)?

Accepted Answer

A) 
= 80,s = 104 
B) 
= 80,s = 5 
C) 
= 70,s = 15 
D) 
= 70,s = 10 
A) 
= 80,s = 104 
B) 
= 80,s = 5 
C) 
= 70,s = 15 
D) 
= 70,s = 10

Question 17

A survey finds that 50% of college students spend 10 hours or less on homework weekly.The percentile rank of _____ is _____.

Accepted Answer

A) 50;10 
B) 10;50 
C) 50;50 
D) cannot be determined 
A) 50;10 
B) 10;50 
C) 50;50 
D) cannot be determined

Question 18

The median is the same as the____________________.

Accepted Answer

The answer of The median is the same as the____________________....

Question 19

Percentile rank reflects a(n)_____ measure of relative standing.

Accepted Answer

A) nominal 
B) interval 
C) ratio 
D) ordinal 
A) nominal 
B) interval 
C) ratio 
D) ordinal

Question 20

In a normal distribution,approximately _____ of all scores fall between the standard scores of -1.96 and +196.

Accepted Answer

A) 95% 
B) 75% 
C) 66% 
D) 50% 
A) 95% 
B) 75% 
C) 66% 
D) 50%

Given a normal distribution of test scores with = 80,s²= 49,what is the z score corresponding to a test score of 70?

The percentile rank of a score is the same as a percentile.

What proportion of scores in a normal distribution lies between z scores of -1.55and +1.55?

IQ test are based on a normal distribution.If someone's Standard score is 0 what is his IQ?

The _____ of a set of standard scores is always equal to 0.

What proportion of scores in a normal distribution are above z = 1.96 and below z = -2.17?

A standard score represents the number of standard deviation units that a score falls above or below the mean.

What are some of the advantages of standard scores over percentile ranks?

For a T score with a mean of 50 and a standard deviation of 10,the T score equivalent to a standard score of 2.5 is _____.

Julie took the same psychology exam as John and received a score of 65 what is her standard score?

A negative standard score indicates that the original score is less than the mean.

When comparing to scores from different distributions you should convert them into a Standard Distribution.

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 approximate percentile rank?

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 T score (for a mean of 50 and a standard deviation of 10)?

John scored an 85 on his most recent psychology exam.Which of the following distributions would John least prefer (assuming he wishes to perform as well as possible,and higher test scores are more favorable)?

A survey finds that 50% of college students spend 10 hours or less on homework weekly.The percentile rank of _ is _.

The median is the same as the____________________.

Percentile rank reflects a(n)_____ measure of relative standing.

In a normal distribution,approximately _____ of all scores fall between the standard scores of -1.96 and +196.

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

Given a normal distribution of test scores with = 80,s2 = 49,what is the z score corresponding to a test score of 70?

The percentile rank of a score is the same as a percentile.

What proportion of scores in a normal distribution lies between z scores of -1.55and +1.55?

IQ test are based on a normal distribution.If someone's Standard score is 0 what is his IQ?

The _____ of a set of standard scores is always equal to 0.

What proportion of scores in a normal distribution are above z = 1.96 and below z = -2.17?

A standard score represents the number of standard deviation units that a score falls above or below the mean.

What are some of the advantages of standard scores over percentile ranks?

For a T score with a mean of 50 and a standard deviation of 10,the T score equivalent to a standard score of 2.5 is _____.

Julie took the same psychology exam as John and received a score of 65 what is her standard score?

A negative standard score indicates that the original score is less than the mean.

When comparing to scores from different distributions you should convert them into a Standard Distribution.

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 approximate percentile rank?

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 T score (for a mean of 50 and a standard deviation of 10)?

John scored an 85 on his most recent psychology exam.Which of the following distributions would John least prefer (assuming he wishes to perform as well as possible,and higher test scores are more favorable)?

A survey finds that 50% of college students spend 10 hours or less on homework weekly.The percentile rank of _____ is _____.

The median is the same as the____________________.

Percentile rank reflects a(n)_____ measure of relative standing.

In a normal distribution,approximately _____ of all scores fall between the standard scores of -1.96 and +196.

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

Given a normal distribution of test scores with = 80,s²= 49,what is the z score corresponding to a test score of 70?

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 approximate percentile rank?

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 T score (for a mean of 50 and a standard deviation of 10)?

A survey finds that 50% of college students spend 10 hours or less on homework weekly.The percentile rank of _ is _.