Question 1

Use the following data: 33, 40, 12, 25, 80.

What is the mean of the data?

Accepted Answer

38

Answer

68

Answer

98

Answer

33

Question 2

Use the following data: 33, 40, 12, 25, 80.

What is the median of the data?

Accepted Answer

33

Answer

68

Answer

38

Answer

80

Question 3

Use the following data: 33, 40, 12, 25, 80.

What is the mode of the data?

Accepted Answer

There is no mode.

Answer

33

Answer

25

Answer

12

Question 4

Which measure of central tendency is most influenced by skewed data or extreme scores in a distribution?

Accepted Answer

Mean

Answer

Median

Answer

Mode

Answer

Percentile rank

Question 5

A researcher calculates statistical significance for her study and finds a 5 percent possibility that the results are due to chance. Which of the following is an accurate interpretation of this finding?

Accepted Answer

This result reflects the minimum standard typically considered statistically significant.

Answer

This result is highly statistically significant.

Answer

This result is not statistically significant.

Answer

This result cannot be evaluated on statistical significance without replication of the study.

Question 6

Descriptive statistics ____________ , while inferential statistics ____________.

Accepted Answer

summarize data; assess if data can be generalized

Answer

describe data from experiments; describe data from surveys and case studies

Answer

are measures of central tendency; are measures of variance

Answer

determine whether data can be generalized to other populations; summarize data

Question 7

In a normal distribution, what percentage of the scores in the distribution falls within one standard deviation on either side of the mean?

Accepted Answer

68 percent

Answer

34 percent

Answer

50 percent

Answer

95 percent

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