Question 1

A greater standard deviation indicates less variance.

Accepted Answer

A) True 
 B)False

Question 2

What is the standard deviation for the following set of scores: 10, 15, 12, 18, 19, 16, 12?

Accepted Answer

A) 3.36 
B) 11.29 
C) 6.47 
D) 17.78 
A) 3.36 
B) 11.29 
C) 6.47 
D) 17.78

Question 3

In the formula for computing the range, this is used to represent the range.

Accepted Answer

A) rho 
B) Ran. 
C) r 
D) rhi 
A) rho 
B) Ran. 
C) r 
D) rhi

Question 4

In the formula for computing the range, what does the letter h represent?

Accepted Answer

A) summation 
B) sample size 
C) highest score 
D) lowest score 
A) summation 
B) sample size 
C) highest score 
D) lowest score

Question 5

In the formula for calculating the standard deviation, what does the Greek letter Σ represent?

Accepted Answer

A) summation 
B) sample size 
C) mean score for group 
D) individual scores 
A) summation 
B) sample size 
C) mean score for group 
D) individual scores

Question 6

Unbiased estimates can be used ______.

Accepted Answer

A) to make sample estimates 
B) to make population estimates 
C) to make sample or population estimates 
D) none of these 
A) to make sample estimates 
B) to make population estimates 
C) to make sample or population estimates 
D) none of these

Question 7

Unbiased estimates ______.

Accepted Answer

A) are less conservative estimates of sample statistics 
B) are more conservative estimates of sample statistics 
C) are less conservative estimates of population parameters 
D) are more conservative estimates of population parameters 
A) are less conservative estimates of sample statistics 
B) are more conservative estimates of sample statistics 
C) are less conservative estimates of population parameters 
D) are more conservative estimates of population parameters

Question 8

Define variability.

Accepted Answer

Variability reflects how score

Question 9

What is the standard deviation squared?

Accepted Answer

A) range 
B) mean deviation 
C) variance 
D) this cannot be computed 
A) range 
B) mean deviation 
C) variance 
D) this cannot be computed

Question 10

In the formula for computing the range, what does the letter l represent?

Accepted Answer

A) range 
B) variability 
C) highest score 
D) lowest score 
A) range 
B) variability 
C) highest score 
D) lowest score

Question 11

Unbiased estimates are considered to be less conservative estimates.

Accepted Answer

A) True 
 B)False

Question 12

What is another term for variability?

Accepted Answer

A) flux or variation 
B) scattergram 
C) skewness 
D) spread or dispersion 
A) flux or variation 
B) scattergram 
C) skewness 
D) spread or dispersion

Question 13

How are the standard deviation and the variance similar? How are they different?

Accepted Answer

The standard deviation and variance are

Question 14

Unbiased estimates ______.

Accepted Answer

A) subtract 1 from the sample size 
B) add 1 to the sample size 
C) do not change the sample size 
D) multiply the sample size by 1 
A) subtract 1 from the sample size 
B) add 1 to the sample size 
C) do not change the sample size 
D) multiply the sample size by 1

Question 15

Can the measures of central tendency and the measures of variability be used together to describe a set of scores? If so, how?

Accepted Answer

Yes, the measures of central tendency an

Question 16

Which measure of variability is easiest to calculate?

Accepted Answer

A) standard deviation 
B) mode 
C) range 
D) variance 
A) standard deviation 
B) mode 
C) range 
D) variance

Question 17

The highest score minus the lowest score is equal to the _______.

Accepted Answer

A) standard deviation 
B) inclusive range 
C) exclusive range 
D) variance 
A) standard deviation 
B) inclusive range 
C) exclusive range 
D) variance

Question 18

What is the range for the following set of scores: 29, 48, 22, 37, 55?

Accepted Answer

A) 26 
B) 33 
C) 37 
D) 55 
A) 26 
B) 33 
C) 37 
D) 55

Question 19

Which measure of variability is most general and, hence, least useful?

Accepted Answer

A) median 
B) range 
C) standard deviation 
D) mean deviation 
A) median 
B) range 
C) standard deviation 
D) mean deviation

Question 20

Why is the square root taken when computing s?

Accepted Answer

In order to compute the standard deviati

Exam 3: Vive La Différence: Understanding Variability

A greater standard deviation indicates less variance.

What is the standard deviation for the following set of scores: 10, 15, 12, 18, 19, 16, 12?

In the formula for computing the range, this is used to represent the range.

In the formula for computing the range, what does the letter h represent?

In the formula for calculating the standard deviation, what does the Greek letter Σ represent?

Unbiased estimates can be used ______.

Unbiased estimates ______.

Define variability.

What is the standard deviation squared?

In the formula for computing the range, what does the letter l represent?

Unbiased estimates are considered to be less conservative estimates.

What is another term for variability?

How are the standard deviation and the variance similar? How are they different?

Unbiased estimates ______.

Can the measures of central tendency and the measures of variability be used together to describe a set of scores? If so, how?

Which measure of variability is easiest to calculate?

The highest score minus the lowest score is equal to the _______.

What is the range for the following set of scores: 29, 48, 22, 37, 55?

Which measure of variability is most general and, hence, least useful?

Why is the square root taken when computing s?

Statistics or Sadistics Its up to You

Means to an End: Computing and Understanding Averages

A Picture Really Is Worth a Thousand Words

Ice Cream and Crime: Computing Correlation Coefficients

Just the Truth: An Introduction to Understanding Reliability and Validity

Hypotheticals and You: Testing Your Questions

Are Your Curves Normal Probability and Why It Counts

Significantly Significant: What It Means for You and Me

Only the Lonely: The One Sample Z-Test

Tea for Two: Tests Between the Means of Different Groups

Tea for Two Again: Tests Between the Means of Related Groups

Two Groups Too Many Try Analysis of Variance

Two Too Many Factors: Factorial Analysis of Variancea Brief Introduction

Cousins or Just Good Friends Testing Relationships Using Correlation Coefficient

Predicting Wholl Win the Super Bowl: Using Linear Regression

What to Do When Youre Not Normal: CHI-Square and Some Other Nonparametric Tests

Some Other Important Statistical Procedures You Should Know About

Data Mining: An Introduction to Getting the Most Out of Your Big Data

A Statistical Software Sampler

The Ten or More Best and Most Fun Internet Sites for Statistics Stuff

The Ten Commandments of Data Collection

Filters