AP Stats Unit

Which of the following is NOT a measure of central tendency?

• Mean

• Median

• Mode

• Range

A data set has a mean of 25 and a median of 23. Which of the following statements is true?

• The data set is positively skewed.

• The data set is negatively skewed.

• The data set is symmetric.

• The data set cannot be determined based on the given information.

In a histogram, the horizontal axis represents:

• The frequency of each data value.

• The range of the data set.

• The intervals or categories of the data.

• The cumulative frequency.

Which of the following is NOT a measure of variability?

• Standard deviation

• Interquartile range

• Variance

• Mean absolute deviation

Is this a probability distribution?

• No, the sum of p(x) does not equal 1.

• Yes, all p(x) are between 0 and 1.

• No, all p(x) are not between 0 and 1.

• Yes, the sum p(x) is 1.

Is this a probability distribution?

• No

• Yes

• A

• B

• C

• D

• E

Which of the following is a measure of association between two quantitative variables?

• Correlation coefficient

• Standard error

• Confidence interval

• Z-score

A data set has a mode of 10 and a median of 15. Which of the following statements is true?

• The data set is positively skewed.

• The data set is negatively skewed.

• The data set is symmetric.

• The data set cannot be determined based on the given information.

The coefficient of determination is:

• The square of the correlation coefficient.

• The inverse of the correlation coefficient.

• The product of the correlation coefficient and the standard deviation.

• The difference between the correlation coefficient and the standard deviation.