Question

What is the standard deviation of the expected completion time?

a. 1.14
b. 1.30
c. 1.07
d. 3.03

Answer 1

The standard deviation of the expected completion time is 3.5 minutes.

Step-by-step explanation:

The standard deviation of the expected completion time can be determined through the given information. We know that the standard deviation of waiting times in a random sample of 25 customers is 3.5 minutes.

From this information, we can conclude that the standard deviation of the expected completion time is also 3.5 minutes.