Answer:
standard deviation on the critical path is 1.22
Explanation:
Given the four (4) activities below,
Activities A has Variance (.33)
Activities B has Variance (.67)
Activities C has Variance (.33)
Activities D has Variance (.17)
Hence,
Standard Deviation = √sum of variance of activities A,B,C and D
=√.33+.67+.33+.17
SD= √1.5
SD= 1.22