Question 1

In a normal distribution,50% of all scores fall between standard scores of -1 and +1.

Accepted Answer

A) True 
 B)False

Question 2

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 3

The median corresponds to the 50th percentile.

Accepted Answer

A) True 
 B)False

Question 4

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 5

Given an approximately normal distribution of test scores with µ = 75,ó = 25,what test (raw)score would correspond to a z score of 1.5?

Accepted Answer

A) 77.5 
B) 87.5 
C) 76.5 
D) cannot be determined 
A) 77.5 
B) 87.5 
C) 76.5 
D) cannot be determined

Question 6

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

Accepted Answer

A) True 
 B)False

Question 7

A standard score is the difference between the original score and the standard deviation,divided by the mean.

Accepted Answer

A) True 
 B)False

Question 8

Z-scores are based on the use of the bell shape curve.

Accepted Answer

A) True 
 B)False

Question 9

The scores below represent the results of an in-class quiz worth 10 points.
How many students scored a 5 or below?

Accepted Answer

A) 75% 
B) 60%` 
C) 25% 
D) None of these 
A) 75% 
B) 60%` 
C) 25% 
D) None of these

Question 10

Why are standard scores important?

Accepted Answer

A) They allow us to compare scores from different distributions 
B) They allow us to predict behavior 
C) They allow us to put scores into an ordinal distribution 
D) None of these 
A) They allow us to compare scores from different distributions 
B) They allow us to predict behavior 
C) They allow us to put scores into an ordinal distribution 
D) None of these

Question 11

The scores below represent the results of an in-class quiz worth 10 points.
How many students scored a 7 on the exam?

Accepted Answer

A) 75% 
B) 60% 
C) 25% 
D) None of these 
A) 75% 
B) 60% 
C) 25% 
D) None of these

Question 12

You discovered that your Statistics professor never gives out raw scores only standard scores.You are relieved because you saw a "0" on the top of your paper.This means you scored_____.

Accepted Answer

A) at the mean 
B) below the mean 
C) an F 
D) None of these 
A) at the mean 
B) below the mean 
C) an F 
D) None of these

Question 13

It is always the case that 50% of the scores in a normal distribution occur above the mean and 50% of the scores occur below the mean.

Accepted Answer

A) True 
 B)False

Question 14

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 15

The average family watches 40 hours of TV a week and uses the computer about 80 hours a week.Based on this information we know that the average family spends 50% more time on the computer.

Accepted Answer

A) True 
 B)False

Question 16

Jeff was told that on his GRE is scored in the 85th percentile which means____________________.

Accepted Answer

85% of the

In a normal distribution,50% of all scores fall between standard scores of -1 and +1.

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

The median corresponds to the 50th percentile.

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)?

Given an approximately normal distribution of test scores with µ = 75,ó = 25,what test (raw)score would correspond to a z score of 1.5?

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

A standard score is the difference between the original score and the standard deviation,divided by the mean.

Z-scores are based on the use of the bell shape curve.

The scores below represent the results of an in-class quiz worth 10 points. How many students scored a 5 or below?

Why are standard scores important?

The scores below represent the results of an in-class quiz worth 10 points. How many students scored a 7 on the exam?

You discovered that your Statistics professor never gives out raw scores only standard scores.You are relieved because you saw a "0" on the top of your paper.This means you scored_____.

It is always the case that 50% of the scores in a normal distribution occur above the mean and 50% of the scores occur below the mean.

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?

The average family watches 40 hours of TV a week and uses the computer about 80 hours a week.Based on this information we know that the average family spends 50% more time on the computer.

Jeff was told that on his GRE is scored in the 85^th percentile which means____________________.

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

In a normal distribution,50% of all scores fall between standard scores of -1 and +1.

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

The median corresponds to the 50th percentile.

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)?

Given an approximately normal distribution of test scores with µ = 75,ó = 25,what test (raw)score would correspond to a z score of 1.5?

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

A standard score is the difference between the original score and the standard deviation,divided by the mean.

Z-scores are based on the use of the bell shape curve.

The scores below represent the results of an in-class quiz worth 10 points. How many students scored a 5 or below?

Why are standard scores important?

The scores below represent the results of an in-class quiz worth 10 points. How many students scored a 7 on the exam?

You discovered that your Statistics professor never gives out raw scores only standard scores.You are relieved because you saw a "0" on the top of your paper.This means you scored_____.

It is always the case that 50% of the scores in a normal distribution occur above the mean and 50% of the scores occur below the mean.

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?

The average family watches 40 hours of TV a week and uses the computer about 80 hours a week.Based on this information we know that the average family spends 50% more time on the computer.

Jeff was told that on his GRE is scored in the 85th percentile which means____________________.

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

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)?

Jeff was told that on his GRE is scored in the 85^th percentile which means____________________.