this is the class of test scores of 31 students in a stat class. a) find the mean, median, standard deviation,shape of distribution(symmetric,skewed to rigth or left)
b) find the Z score for the student whom got 70
Class f x xf x*2f
F 52-60 5 56 280 15680

D 61-69 5 65 325 21125

C 70-78 8 74 592 43808

B 79-87 10 83 830 68890

A 88-96 3 92 276 25392