Answer ques 44 (043. Find mean and the standard deviation of the following two groups taken together:
Group
B
Number
113
121
159
149
[Combined: Xl
S.D.
22.4
20.0
2 = 153.83, = 21.8
Q.44. The number examined, the mean weight and standard deviation in each group of examinatiol
by two medical examiners are given below. Calculate mean and standard deviation
both the groups taken together.
Medical Examiner
B
Number
Examined
50
60
Mean
Weight
113
120
[Combined:
Standard
Deviation
(lbs)
6.5
8.2
Xl,2 = 116.82, = 825
