AP Psychology Statistical Reasoning

What is the mean of the data?

• 38

• 68

• 98

• 33

For question, use the following data: 33, 40, 12, 25, 80. What is the median of the data?

• 33

• 68

• 38

• 80

For the question, use the following data: 33, 40, 12, 25, 80. What is the mode of the data?

• There is no mode.

• 33

• 25

• 12

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

• Mean

• Median

• Mode

• Percentile rank

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?

• The results are statistically significant.

• The results are not statistically significant.

• There is a 95 percent chance the results are not due to chance.

• There is a 5 percent chance the results are not due to chance.

This result is highly statistically significant.

• This result reflects the minimum standard typically considered statistically significant.

• This result is not statistically significant.

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

Descriptive statistics ____________, while inferential statistics ____________.

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

• 34 percent

• 50 percent

• 68 percent

• 95 percent

What is the mode?

• 2.60 books
• 1 book
• 1.5 books
• 6 books