The mean SAT math scores for selected states are represented below. Find the mean class, modal class,

Question:

The mean SAT math scores for selected states are represented below. Find the mean class, modal class, variance, and standard deviation, and comment on the shape of the data.
Score Frequency
478–504 ...... 4
505–531 ...... 6
532–558 ...... 2
559–585 ...... 2
586–612 ...... 2