A random sample of 20 marks from an IA scores in STAT 111 is listed below. Calculate the sample mean and sample standard deviation 29, 26, 13, 23, 23, 25, 17, 22, 17, 19, 12, 26, 30, 30, 18, 14, 12, 26, 17, 18
A. 20.50 , 6.02
B. 20.85 , 5.94
C. 20.85 , 35.29
D. 20.50 , 5.94
E. 20.55 , 35.29
