Question

mrs. rodrigues wants to compare the spread of the test scores of her two biology classes. which statistic should she use?
mean
standard deviation
median
mode

Explanation:

The mean is the average value, the median is the middle - value, and the mode is the most frequent value. Standard deviation measures the amount of variation or dispersion of a set of values. To compare the spread of test scores, standard deviation is the appropriate statistic.

Answer:

B. standard deviation