Question 1

What proportion of scores in a normal distribution are between z = -1.75 and z = -2.75?

Accepted Answer

A) .0371 
B) .0431 
C) .4599 
D) .4970 
A) .0371 
B) .0431 
C) .4599 
D) .4970

Question 2

The scores below represent the results of an in-class quiz worth 10 points.
What is the relative frequency associated with a score of 9?

Accepted Answer

A) .15 
B) .30 
C) .45 
D) 3 
A) .15 
B) .30 
C) .45 
D) 3

Question 3

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 4

What are some of the important properties of standard scores?

Accepted Answer

A positive standard score indicates that

Question 5

The scores below represent the test scores for a 10 point pop quiz in this class.
a.Fill out the entire frequency distribution and please answer the questions below.
  
b.What is the median or the 50th percentile?
c.What score represents the 80th percentile?

Accepted Answer

Question 6

The standard deviation of a set of standard scores in a distribution is _____.

Accepted Answer

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

Question 7

The median corresponds to the _____ percentile.

Accepted Answer

A) 50th 
B) 75th 
C) average 
D) standard 
A) 50th 
B) 75th 
C) average 
D) standard

Question 8

If your standard score on the exam is -1,you are 1 point below the mean.

Accepted Answer

A) True 
 B)False

Question 9

A survey finds that 80% of high school students scored at least 75 on a given intelligence test.The 80th _____ is _____.

Accepted Answer

A) percentile;75 
B) value;75 
C) score;75% 
D) percentile;25 
A) percentile;75 
B) value;75 
C) score;75% 
D) percentile;25

Question 10

Percentiles are used in standardized testing such as the SAT.

Accepted Answer

A) True 
 B)False

Question 11

A standard score converts a score from its original,or raw form to a form that takes into consideration its standing relative to the _____ and _____ of the entire distribution of scores.

Accepted Answer

A) percentile;percentile rank 
B) percentile;standard deviation 
C) mean;percentile rank 
D) mean;standard deviation 
A) percentile;percentile rank 
B) percentile;standard deviation 
C) mean;percentile rank 
D) mean;standard deviation

Question 12

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 13

To say that a score has a percentile rank of 80 is simply to state that 80% of the individuals scored at or above that score.

Accepted Answer

A) True 
 B)False

Question 14

In most normal distributions,the mean,the median,and the mode are different from each other.

Accepted Answer

A) True 
 B)False

Question 15

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 16

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 17

Approximately what proportion of a normal distribution lies between the z scores of +.66 and +1.55?

Accepted Answer

A) 57% 
B) 63% 
C) 68% 
D) 32% 
A) 57% 
B) 63% 
C) 68% 
D) 32%

Question 18

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 19

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 percentile rank of a score of 47?

Accepted Answer

A) 10 
B) 52.5 
C) 82.5 
D) 90 
A) 10 
B) 52.5 
C) 82.5 
D) 90

Question 20

On average a person sleeps 6 hours a day with a standard deviation of 1 hour.John says he sleeps 10 hours a day.What is his standard score?

Accepted Answer

A) 5.5 
B) 4.5 
C) 2.5 
D) None of these 
A) 5.5 
B) 4.5 
C) 2.5 
D) None of these

What proportion of scores in a normal distribution are between z = -1.75 and z = -2.75?

The scores below represent the results of an in-class quiz worth 10 points. What is the relative frequency associated with a score of 9?

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

What are some of the important properties of standard scores?

The scores below represent the test scores for a 10 point pop quiz in this class. a.Fill out the entire frequency distribution and please answer the questions below. b.What is the median or the 50^th percentile? c.What score represents the 80^th percentile?

The standard deviation of a set of standard scores in a distribution is _____.

The median corresponds to the _____ percentile.

If your standard score on the exam is -1,you are 1 point below the mean.

A survey finds that 80% of high school students scored at least 75 on a given intelligence test.The 80th _ is _.

Percentiles are used in standardized testing such as the SAT.

A standard score converts a score from its original,or raw form to a form that takes into consideration its standing relative to the _ and _ of the entire distribution of scores.

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.

To say that a score has a percentile rank of 80 is simply to state that 80% of the individuals scored at or above that score.

In most normal distributions,the mean,the median,and the mode are different from each other.

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

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

Approximately what proportion of a normal distribution lies between the z scores of +.66 and +1.55?

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

On average a person sleeps 6 hours a day with a standard deviation of 1 hour.John says he sleeps 10 hours a day.What is his standard score?

Introduction and Mathematical Preliminaries

Frequency and Probability Distributions

Measures of Central Tendency and Variability

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

What proportion of scores in a normal distribution are between z = -1.75 and z = -2.75?

The scores below represent the results of an in-class quiz worth 10 points. What is the relative frequency associated with a score of 9?

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

What are some of the important properties of standard scores?

The scores below represent the test scores for a 10 point pop quiz in this class. a.Fill out the entire frequency distribution and please answer the questions below. b.What is the median or the 50th percentile? c.What score represents the 80th percentile?

The standard deviation of a set of standard scores in a distribution is _____.

The median corresponds to the _____ percentile.

If your standard score on the exam is -1,you are 1 point below the mean.

A survey finds that 80% of high school students scored at least 75 on a given intelligence test.The 80th _____ is _____.

Percentiles are used in standardized testing such as the SAT.

A standard score converts a score from its original,or raw form to a form that takes into consideration its standing relative to the _____ and _____ of the entire distribution of scores.

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.

To say that a score has a percentile rank of 80 is simply to state that 80% of the individuals scored at or above that score.

In most normal distributions,the mean,the median,and the mode are different from each other.

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

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

Approximately what proportion of a normal distribution lies between the z scores of +.66 and +1.55?

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

On average a person sleeps 6 hours a day with a standard deviation of 1 hour.John says he sleeps 10 hours a day.What is his standard score?

Introduction and Mathematical Preliminaries

Frequency and Probability Distributions

Measures of Central Tendency and Variability

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

The scores below represent the test scores for a 10 point pop quiz in this class. a.Fill out the entire frequency distribution and please answer the questions below. b.What is the median or the 50^th percentile? c.What score represents the 80^th percentile?

A survey finds that 80% of high school students scored at least 75 on a given intelligence test.The 80th _ is _.

A standard score converts a score from its original,or raw form to a form that takes into consideration its standing relative to the _ and _ of the entire distribution of scores.

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.