Use the following to answer the question(s) below.
IT staff for a large corporation has developed the following probability distribution for the number of calls requiring troubleshooting problems per day.

-The standard deviation of the sampling distribution of mean times is
A) 0.4 minutes.
B) 2 minutes.
C) 0.08 minutes.
D) 1.6 minutes.
E) 0.12 minutes.

Question

Use the following to answer the question(s) below.
IT staff for a large corporation has developed the following probability distribution for the number of calls requiring troubleshooting problems per day.

-The standard deviation of the sampling distribution of mean times is
A) 0.4 minutes. 
B) 2 minutes. 
C) 0.08 minutes. 
D) 1.6 minutes. 
E) 0.12 minutes.

Quizplus · Accepted Answer

The standard deviation of the sampling distribution of the mean, often called the standard error, is calculated by dividing the population standard deviation by the square root of the sample size. Given that the population standard deviation is 2 minutes and the sample size is 25, the calculation is 2 / sqrt(25) = 2 / 5 = 0.4 minutes.

Use the Following to Answer the Question(s) Below