Mrs. myles gave the same test to both her first and third period class. in first period, the mean was 75 and the range was 30. in third period, the mean was 85 and the range was 50. which is a true statement?
a) most of third period scored in the 80's.
b) more people had a score in the 70's in first period.
c) on average, third period did better than first period.
d) on average, first period did better than third period.