Question 1

What are the two types of kurtosis? Explain each.

Accepted Answer

Platykurtic = flat curve; Leptokurtic = peaked curve

Question 2

What is the difference between skewness and kurtosis?

Accepted Answer

Skewness = measure of lack of symmetry; Kurtosis = flatness/peakedness of a distribution curve relative to a normal curve

Question 3

If you have a distribution of 50 scores and you want 5 intervals, what should be the size of your class interval?

Accepted Answer

The class interval should be ten

Question 4

What do you call a continuous line that represents the frequency of scores within a class interval?

Accepted Answer

A)  Polygon 
B)  Line graph 
C)  Histogram 
D)  Tally marks 
A)  Polygon 
B)  Line graph 
C)  Histogram 
D)  Tally marks

Question 5

What is the most basic method of illustrating data?

Accepted Answer

A)  Frequency distribution 
B)  Pie chart 
C)  Line graph 
D)  Polygon 
A)  Frequency distribution 
B)  Pie chart 
C)  Line graph 
D)  Polygon

Question 6

If you have a distribution of 50 scores and you want 10 intervals, what should be the size of your class interval?

Accepted Answer

The class

Question 7

When the right tail of a distribution's curve is longer than the left, what is this called?

Accepted Answer

A)  Platykurtic 
B)  Leptokurtic 
C)  Positive skew 
D)  Negative skew 
A)  Platykurtic 
B)  Leptokurtic 
C)  Positive skew 
D)  Negative skew

Question 8

If you were interested in tracking your GPA during the time you are in graduate school, which of the following might you use?

Accepted Answer

A)  Bar chart 
B)  Line graph 
C)  Pie chart 
D)  Histogram 
A)  Bar chart 
B)  Line graph 
C)  Pie chart 
D)  Histogram

Question 9

What is the term associated with how flat or peaked a distribution appears?

Accepted Answer

A)  Ogive 
B)  Skewness 
C)  Kurtosis 
D)  Variability 
A)  Ogive 
B)  Skewness 
C)  Kurtosis 
D)  Variability

Question 10

List the 10 ways to create great figures outlined in the text.

Accepted Answer

a) Minimize "word junk," b) Plan before

Question 11

What type of graph displays class intervals along an x-axis?

Accepted Answer

A)  Polygon 
B)  Line graph 
C)  Histogram 
D)  Tally marks 
A)  Polygon 
B)  Line graph 
C)  Histogram 
D)  Tally marks

Question 12

What is the definition of a cumulative frequency distribution?

Accepted Answer

Cumulative frequency

Question 13

If you have a distribution of 100 scores and you want 20 intervals, what should be the size of your class interval?

Accepted Answer

The class

Question 14

Which of the following is a method of tallying, and representing, how often a certain score occurs?

Accepted Answer

A)  Class interval 
B)  Frequency distribution 
C)  Histogram 
D)  Polygon 
A)  Class interval 
B)  Frequency distribution 
C)  Histogram 
D)  Polygon

Question 15

Which of the following refers to a distribution's curve that is relatively flat in comparison to a normal curve?

Accepted Answer

A)  Platykurtic 
B)  Leptokurtic 
C)  Positive skew 
D)  Negative skew 
A)  Platykurtic 
B)  Leptokurtic 
C)  Positive skew 
D)  Negative skew

Question 16

If the mean of a set of scores is greater than the median, what can be said about the distribution?

Accepted Answer

A)  Negatively skewed 
B)  Positively skewed 
C)  Platykurtic 
D)  Leptokurtic 
A)  Negatively skewed 
B)  Positively skewed 
C)  Platykurtic 
D)  Leptokurtic

Question 17

What are the two types of skewness? Explain each.

Accepted Answer

Positively skewed = right tail

Question 18

In order to say that a distribution is positively skewed, which of the following must be true?

Accepted Answer

A)  Right tail must be longer than the left 
B)  Right tail must be shorter than the left 
C)  Right and left tails must be equal 
D)  Curve must be bell-shaped 
A)  Right tail must be longer than the left 
B)  Right tail must be shorter than the left 
C)  Right and left tails must be equal 
D)  Curve must be bell-shaped

Question 19

In order to create a histogram in Excel, you must identify the "bins" you want. To what are the bins referring?

Accepted Answer

A)  Polygon 
B)  Tally marks 
C)  Histogram 
D)  Class interval 
A)  Polygon 
B)  Tally marks 
C)  Histogram 
D)  Class interval

Question 20

When the left tail of a distribution's curve is longer than the right, what is this called?

Accepted Answer

A)  Platykurtic 
B)  Leptokurtic 
C)  Positive skew 
D)  Negative skew 
A)  Platykurtic 
B)  Leptokurtic 
C)  Positive skew 
D)  Negative skew

What are the two types of kurtosis? Explain each.

What is the difference between skewness and kurtosis?

If you have a distribution of 50 scores and you want 5 intervals, what should be the size of your class interval?

What do you call a continuous line that represents the frequency of scores within a class interval?

What is the most basic method of illustrating data?

If you have a distribution of 50 scores and you want 10 intervals, what should be the size of your class interval?

When the right tail of a distribution's curve is longer than the left, what is this called?

If you were interested in tracking your GPA during the time you are in graduate school, which of the following might you use?

What is the term associated with how flat or peaked a distribution appears?

List the 10 ways to create great figures outlined in the text.

What type of graph displays class intervals along an x-axis?

What is the definition of a cumulative frequency distribution?

If you have a distribution of 100 scores and you want 20 intervals, what should be the size of your class interval?

Which of the following is a method of tallying, and representing, how often a certain score occurs?

Which of the following refers to a distribution's curve that is relatively flat in comparison to a normal curve?

If the mean of a set of scores is greater than the median, what can be said about the distribution?

What are the two types of skewness? Explain each.

In order to say that a distribution is positively skewed, which of the following must be true?

In order to create a histogram in Excel, you must identify the "bins" you want. To what are the bins referring?

When the left tail of a distribution's curve is longer than the right, what is this called?

Statistics or Sadistics? It’s Up to You

Means to an End: Computing and Understanding Averages

Vive La Différence: Understanding Variability

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 4: A Picture Really Is Worth a Thousand Words

What are the two types of kurtosis? Explain each.

What is the difference between skewness and kurtosis?

If you have a distribution of 50 scores and you want 5 intervals, what should be the size of your class interval?

What do you call a continuous line that represents the frequency of scores within a class interval?

What is the most basic method of illustrating data?

If you have a distribution of 50 scores and you want 10 intervals, what should be the size of your class interval?

When the right tail of a distribution's curve is longer than the left, what is this called?

If you were interested in tracking your GPA during the time you are in graduate school, which of the following might you use?

What is the term associated with how flat or peaked a distribution appears?

List the 10 ways to create great figures outlined in the text.

What type of graph displays class intervals along an x-axis?

What is the definition of a cumulative frequency distribution?

If you have a distribution of 100 scores and you want 20 intervals, what should be the size of your class interval?

Which of the following is a method of tallying, and representing, how often a certain score occurs?

Which of the following refers to a distribution's curve that is relatively flat in comparison to a normal curve?

If the mean of a set of scores is greater than the median, what can be said about the distribution?

What are the two types of skewness? Explain each.

In order to say that a distribution is positively skewed, which of the following must be true?

In order to create a histogram in Excel, you must identify the "bins" you want. To what are the bins referring?

When the left tail of a distribution's curve is longer than the right, what is this called?

Statistics or Sadistics? It’s Up to You

Means to an End: Computing and Understanding Averages

Vive La Différence: Understanding Variability

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