Chapter 4

Question 1

What is the median for the following data set? 8 8 9 10 11 11 11 12
a. 10.5
b. 10
C. 11
d. 11.5

Answer 1

10.5

Question 2

When a study describes a sample as 62% female, this percentage is an example of what type of statistic?
a. Mode
b. Range
C. Standard deviation
d. Frequency

Answer 2

frequency

Question 3

The mode is the most useful measure of central tendency when the data
a. is skewed.
b. includes a few outliers.
c. is categorical.
d. is normally distributed.

Answer 3

is categorical

Question 4

What type of graph is best to use when you want to illustrate changes over time?
a. Bar graph
b. Histogram
c. Pie chart
d. Line graph

Answer 4

line graph

Question 5

In a normal distribution, the percentage of people that have scores one standard deviation above and one standard deviation below is the mean is:
a. Approximately 68%
b. Approximately 34%
c. Approximately 27%
d. Approximately 96%

Answer 5

Approximately 68%

Question 6

In which of the following samples would you expect to find the largest standard deviation for a set of scores measuring cardiovascular endurance?
a. A group of long-distance runners
b. A group of sedentary adults
C. A group of pickleball athletes
d. A group that includes both sedentary and active adults

Answer 6

A group that includes both sedentary and active adults

Question 7

If an exam were very easy, and most students received very high grades and very few people received low grades, the frequency distribution would be described as
a. Bimodal
b. Negatively skewed
C. Positively skewed
d. Normally distributed

Answer 7

Negatively skewed

Question 8

In a hypothetical normal distribution, the mean is 10 and the standard deviation is 3. What is the score for a person who scores -I standard deviations below the mean?
a. 13
b. 10
C. 7
d. -3

Answer 8

7