A renovation of the gift shop at Orlando Amway Center has six activities (in hou

Question

A renovation of the gift shop at Orlando Amway Center has six activities (in hours). In the following table, the estimates of a, m, and b times for each of the activities are listed Activity 10 28 18 14 31 18 14 18 20 19 21 16 15 19 Expected Time 14 32 18 14 Based on the activity time estimates, the expected times for each of the activities are (round your responses to two decimal places) Activity 18.67 Based on the activity time estimates, standard deviation for each of the activities is (enter your responses rounded to two decimal places). Standard Deviation Activity

Explanation / Answer

Here expected time will be calculated by

E[X] = (a + 4m + b)/6

which is calculated here

now for standard deviation

so for Activity A

SD[A] = [b -a]/6 = [18 - 10]/6 = 1.33

SD[B] = [40 - 28]/6 = 2

SD[C] = [18 - 18]/6 = 0

SD[D]= [20 - 8] /6 = 2

SD[E]= [19 - 16]/6 = 0.5

SD[F}= [21 - 15]/6 = 1

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