It has been reported that the average time to download the home page from a government website was 0.9 seconds.Suppose that the download times were normally distributed with a standard deviation of 0.3 seconds.If random samples of 36 download times are selected,calculate the standard deviation of the sampling distribution of the sample mean.
A)0.3
B)0.15
C)0.9
D)0.05

Question

Quizplus · Accepted Answer

The standard deviation of the sampling distribution of the sample mean (standard error) is calculated by dividing the population standard deviation by the square root of the sample size: 0.3 / √36 = 0.05.

It Has Been Reported That the Average Time to Download