The dot plots show the forearm lengths of 2 groups of 10 students. what statements could be true

a. the standard deviation of group a is equal to the standard deviation of group b.

b. group a has greater variability than group b

c. all of the people in group a have longer forearms than the people in group b.

d. using only group a , the mean is equal to the median .

e. the meanbof group a's lengths is greater then the means of group b's lengths