Measuring Variability

1. It is the simplest measure of variability.

• A. average deviation

• B. range

• C. standard deviation

• D. variance

2. It is square of standard deviation.

• A. mean

• B. standard deviation

• C. variance

• D. none of these

3. The measure of the variability of a set of data from its mean.

• A. average deviation

• B. range

• C. standard deviation

• D. variance

4. The standard deviation of a sample of 100 observations equals 64. Find the variance of the sample.

• A. 8

• B. 10

• C. 4, 096

• D. 6,400

5. If the range of a set of scores is 14 and the lowest score is 7, what is the highest score?

• A. 7

• B. 14

• C. 21

• D. 24