Question

There are four activities on the critical path. Coincidentally, their standard deviations are all equal to 4. The standard deviation of the critical path is therefore equal to: Multiple Choice 16. 64. 4. 2. 8.

Answer 1

8

Explanation:

Given that :

Number of activities = 4

Standard deviation of each activity = 4

Standard deviation of the critical path =?

To obtain the standard deviation of the critical path :

Take the square of each standard deviation:

Activity 1 = 4² = 16; activity 2 = 4² = 16 ; activity 3 = 4² = 16 ; activity 4 = 4² = 16

Sum of the squares :

16 + 16 + 16 + 16 = 64

Square root of the sum:

√64 = 8