Question

A simple random sample of 50 items resulted in a sample mean of 25. The population standard deviation is a 8. (Round your answers to two decimal places.)

a) What is the standard error of the mean, σ-?

Answer 1

The standard error of the mean is 1.13.

Step-by-step explanation:

The standard error of the mean is a measure of the variability of the sample mean. It is calculated by dividing the population standard deviation by the square root of the sample size. In this scenario, the population standard deviation is 8 and the sample size is 50. So, the standard error of the mean is:

Standard Error of the Mean = population standard deviation / sqrt(sample size) = 8 / sqrt(50) = 1.13