Deck 8: Types of Distributions

Question 1

Given the following frequency distribution, the distribution is:

A)platykurtic
B)leptokurtic
C)mesokurtic
D)skewtokurtic

Answer 1

leptokurtic

Question 2

If a normal curve has a mean of 50 and a standard deviation of 9, then the value at one standard deviation below the mean is:

A)9
B)41
C)47
D)32

Answer 2

41

Question 3

In a normal distribution, approximately 99 percent of all the cases fall between the x-axis values that are one standard deviation less than the mean and one standard deviation greater than the mean.

Answer 3

False

Question 4

A bimodal distribution is one form of a normal distribution.

Question 5

If normal curve A has a mean of 50 and a standard deviation of 5, and normal curve B has a mean of 50 and a standard deviation of 10, then:

A)Curve A has more kurtosis than curve B.
B)Curve A has less kurtosis than curve B.
C)Because both curves are normal, they have the same degree of kurtosis.
D)None of these.

Question 6

Given the following frequency distribution, the distribution is:

A)Normal.
B)Positively skewed.
C)Negatively skewed.
D)Bimodal

Question 7

Given the following frequency distribution, the distribution is:

A)Normal.
B)Positively skewed.
C)Negatively skewed.
D)Bimodal

Question 8

Given the following frequency distribution, the distribution is:

A)Normal.
B)Positively skewed.
C)Negatively skewed.
D)Bimodal

Question 9

Given the following frequency distribution, the distribution is:

A)platykurtic
B)leptokurtic
C)mesokurtic
D)skewtokurtic

Question 10

Given the following frequency distribution, the distribution is:

A)platykurtic
B)leptokurtic
C)mesokurtic
D)skewtokurtic

Question 11

A normal curve with a mean of 100 and a standard deviation of 30 will have the same degree of kurtosis as a normal curve with a mean of 100 and a standard deviation of 5.

Question 12

The greater the kurtosis statistic, the taller, narrower and more peaked the curve.

Question 13

In a normal distribution, the right and left halves of the curve are mirror images of each other.

Question 14

Given the following frequency distribution, the distribution is:

A)Normal.
B)Positively skewed.
C)Negatively skewed.
D)Bimodal

Question 15

Some normal curves are more peaked or flatter than others.

Question 16

A normal curve:

A)Is symmetrical.
B)Is shaped like a bell.
C)Contains an identical mean, median and mode
D)All of these

Question 17

A positively skewed distribution has more values below the mean than above it.

Question 18

In a negatively skewed distribution, more values are below the mean, but the mean is increased by some extremely high values above it.