Mrs. rodrigues wants to compare the spread of the test scores of her two biology classes. which statistic should she use?

The statistics she should use should be one of the measures of variability. There are 4 measures of variability, namely, the range, inter-quartile range, variance, and the standard deviation. She can use the interquartile range to compare the scores by percentile ranking if she wants to know it.

When rates are expressed as a quantity of 1, such as 2 feet per second or 5 miles per hour, they are called unit rates. if you have a multiple-unit rate such as 120 students for every 3 buses, and want to find the single-unit rate, write a ratio equal to the multiple-unit rate with 1 as the second term.