Question 1

What is the s² of the following set of scores? 20, 24, 26, 22, 18, 16, 18

Accepted Answer

The variance is 12.95

Question 2

Variability is a measure of how much each score in a group of scores differs from the what?

Accepted Answer

A)  mode 
B)  median 
C)  variability 
D)  mean 
A)  mode 
B)  median 
C)  variability 
D)  mean D

Question 3

In the formula for computing the variance, what does the letter "n" represent?

Accepted Answer

A)  summation 
B)  sample size 
C)  mean value of the group 
D)  individual scores 
A)  summation 
B)  sample size 
C)  mean value of the group 
D)  individual scores B

Question 4

When calculating the standard deviation, what must be done in order to obtain an unbiased estimate of the population?

Accepted Answer

A)  subtract 1 from X 
B)  subtract 1 from N 
C)  subtract 1 from n 
D)  add 1 to n 
A)  subtract 1 from X 
B)  subtract 1 from N 
C)  subtract 1 from n 
D)  add 1 to n

Question 5

What is the formula for the exclusive range?

Accepted Answer

A)  r - n +1 
B)  h - l + 1 
C)  (h - l)r 
D)  h - l 
A)  r - n +1 
B)  h - l + 1 
C)  (h - l)r 
D)  h - l

Question 6

If you intend to use a sample as an estimate of a population parameter, which standard deviation is the best to calculate?

Accepted Answer

A)  biased 
B)  unbiased 
C)  squared deviation 
D)  mean deviation 
A)  biased 
B)  unbiased 
C)  squared deviation 
D)  mean deviation

Question 7

Write out the two Excel formulas for computing the standard deviation and the variance.

Accepted Answer

VAR(A1:A12

Question 8

What is obtained by squaring the standard deviation?

Accepted Answer

A)  mean deviation 
B)  range 
C)  variance 
D)  squared deviation 
A)  mean deviation 
B)  range 
C)  variance 
D)  squared deviation

Question 9

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

Accepted Answer

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

Question 10

How would you go about computing the variance for a set of scores?

Accepted Answer

You could just square the stan

Question 11

When subtracting the largest number in a distribution from the smallest, what type of variability is being calculated?

Accepted Answer

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

Question 12

Explain why the standard deviation is referred to as an unbiased estimate. Why are unbiased estimates important to researchers?

Accepted Answer

Because n - 1 is used in the denominator

Question 13

What is the range of the following set of scores? 10, 15, 12, 18, 19, 16, 12

Accepted Answer

The answer of What is the range of the following...

Question 14

In the formula for computing the standard deviation, what does the Greek letter "?" represent?

Accepted Answer

A)  summation 
B)  sample size 
C)  mean value of the group 
D)  individual scores 
A)  summation 
B)  sample size 
C)  mean value of the group 
D)  individual scores

Question 15

What is the formula for the standard deviation?

Accepted Answer

The answer of What is the formula for the standard...

Question 16

What is the most frequently used measure of variability?

Accepted Answer

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

Question 17

What is the s² of the following set of scores? 10, 15, 12, 18, 19, 16, 12

Accepted Answer

The varian

Question 18

What is the term associated with scores that are at the extreme ends of the distribution?

Accepted Answer

A)  variability 
B)  outliers 
C)  skew 
D)  percentile 
A)  variability 
B)  outliers 
C)  skew 
D)  percentile

Question 19

What will the sum of the deviations from the mean always equal?

Accepted Answer

A)  n - 1 
B)  0 
C)  1 
D)  n + 1 
A)  n - 1 
B)  0 
C)  1 
D)  n + 1

Question 20

The average and which of the following can be used to describe the characteristics of a distribution and show how distributions differ from one another?

Accepted Answer

A)  mode 
B)  median 
C)  variability 
D)  sum 
A)  mode 
B)  median 
C)  variability 
D)  sum

What is the s² of the following set of scores? 20, 24, 26, 22, 18, 16, 18

Variability is a measure of how much each score in a group of scores differs from the what?

In the formula for computing the variance, what does the letter "n" represent?

When calculating the standard deviation, what must be done in order to obtain an unbiased estimate of the population?

What is the formula for the exclusive range?

If you intend to use a sample as an estimate of a population parameter, which standard deviation is the best to calculate?

Write out the two Excel formulas for computing the standard deviation and the variance.

What is obtained by squaring the standard deviation?

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

How would you go about computing the variance for a set of scores?

When subtracting the largest number in a distribution from the smallest, what type of variability is being calculated?

Explain why the standard deviation is referred to as an unbiased estimate. Why are unbiased estimates important to researchers?

What is the range of the following set of scores? 10, 15, 12, 18, 19, 16, 12

In the formula for computing the standard deviation, what does the Greek letter "?" represent?

What is the formula for the standard deviation?

What is the most frequently used measure of variability?

What is the s² of the following set of scores? 10, 15, 12, 18, 19, 16, 12

What is the term associated with scores that are at the extreme ends of the distribution?

What will the sum of the deviations from the mean always equal?

The average and which of the following can be used to describe the characteristics of a distribution and show how distributions differ from one another?

Statistics or Sadistics? It’s 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

t(ea) for Two (Again): Tests Between the Means of Related Groups

t(ea) 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 Variance

Cousins or Just Good Friends? Testing Relationships Using the Correlation Coefficient

Predicting Who’ll Win the Super Bowl: Using Linear Regression

What to Do When You’re Not Normal: Chi-Square and Some Other Nonparametric Tests

Some Other (Important) Statistical Procedures You Should Know About

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Exam 3: Vive La Différence: Understanding Variability

What is the s² of the following set of scores? 20, 24, 26, 22, 18, 16, 18

Variability is a measure of how much each score in a group of scores differs from the what?

In the formula for computing the variance, what does the letter "n" represent?

When calculating the standard deviation, what must be done in order to obtain an unbiased estimate of the population?

What is the formula for the exclusive range?

If you intend to use a sample as an estimate of a population parameter, which standard deviation is the best to calculate?

Write out the two Excel formulas for computing the standard deviation and the variance.

What is obtained by squaring the standard deviation?

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

How would you go about computing the variance for a set of scores?

When subtracting the largest number in a distribution from the smallest, what type of variability is being calculated?

Explain why the standard deviation is referred to as an unbiased estimate. Why are unbiased estimates important to researchers?

What is the range of the following set of scores? 10, 15, 12, 18, 19, 16, 12

In the formula for computing the standard deviation, what does the Greek letter "?" represent?

What is the formula for the standard deviation?

What is the most frequently used measure of variability?

What is the s² of the following set of scores? 10, 15, 12, 18, 19, 16, 12

What is the term associated with scores that are at the extreme ends of the distribution?

What will the sum of the deviations from the mean always equal?

The average and which of the following can be used to describe the characteristics of a distribution and show how distributions differ from one another?

Statistics or Sadistics? It’s 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

t(ea) for Two (Again): Tests Between the Means of Related Groups

t(ea) 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 Variance

Cousins or Just Good Friends? Testing Relationships Using the Correlation Coefficient

Predicting Who’ll Win the Super Bowl: Using Linear Regression

What to Do When You’re Not Normal: Chi-Square and Some Other Nonparametric Tests

Some Other (Important) Statistical Procedures You Should Know About

Filters