A sample of size 52 will be drawn from a population with mean 18 and standard deviation 13. Find the probability that $\bar { x }$ will be less than 21 .
A) 0.9382
B) 0.9515
C) 0.0485
D) 0.9633

Question

Quizplus · Accepted Answer

The standard error of the mean is calculated as the population standard deviation divided by the square root of the sample size. Using the Z-score formula, the probability that $\bar{x}$ is less than 21 is found to be approximately 0.9515.

A Sample of Size 52 Will Be Drawn from a Population