A renovation of the gift shop at Orlando Amway Center has six activities (in hours). For the following estimates of a, m, and b, calculates the expected time and the standard deviation for each activity:
ACTIVITY
|
a
|
m
|
b
|
A
|
11
|
15
|
19
|
B
|
27
|
31
|
41
|
C
|
18
|
18
|
18
|
D
|
8
|
13
|
19
|
E
|
17
|
18
|
20
|
F
|
16
|
19
|
22
|