Consider an infinite population with a mean of 160 and a standard deviation of 25.A random sample of size 64 is taken from this population.The standard deviation of the sample mean equals:
A) 25
B) 25/64
C) 25/$\surd$64
D) None of these choices.

Question

Quizplus · Accepted Answer

The standard deviation of the sample mean (also known as the standard error) is calculated by dividing the population standard deviation by the square root of the sample size. So, it is 25/√64 = 25/8.

Consider an Infinite Population with a Mean of 160 and a Standard