12 What is the standard error M for a sample size of 45 assu

12. What is the standard error (M) for a sample size of 45 assuming a population mean of 100 and a standard deviation of 20? You must show your work. Round to the nearest hundredth decimal point.

Solution

standar error for a sample size of 45 will be

SD = sigma / srqt (n)

SD = 20 / sqrt (45)

SD = 2.981