AP Psych A - Module 7

Which of the following is a measure of variation?

• Range

• Mean

• Mode

• Frequency

• Median

Which statistical measure of central tendency is most affected by extreme scores?

• Mean

• Median

• Mode

• Skew

• Correlation

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

• This is well beyond the range of statistical significance.

• This is the minimum result typically considered statistically significant.

• This is not statistically significant.

• There is no way to determine statistical significance without replication of the study.

• Chance or coincidence is unrelated to statistical significance.

Descriptive statistics _______, while inferential statistics _______.

• indicate the significance of the data; summarize the data

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

• are measures of central tendency; are measures of variance

• determine if data can be generalized to other populations; summarize data

• summarize data; determine if data can be generalized to other populations

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

• 40 percent

• 50 percent

• 68 percent

• 95 percent