To solve this problem you must apply the proccedure shown below:
1- You must apply the following formula:
Where is the residual,
is the observed value
and
is the predicted value
.
2- You only need to substitute the into the equation
and then, you must apply the formula for calculate the residual:
The answer is: The residual is
Answer:
The standard deviation on the critical path = 0.834
Step-by-step explanation:
Variance of activity A () = 0.33
Variance of activity B () = 0.67
Variance of activity C () = 0.33
Variance of activity D () = 0.17
Thus the standard deviation on the critical path () =
+
+
+
=
+
+
+
= 0.6956
= 0.834
The standard deviation on the critical path = 0.834