Question

The office of student services at a large western state university maintains information on the study habits of its full-time students. their studies indicate that the mean amount of time undergraduate students study per week is 20 hours. the hours studied follows the normal distribution with a standard deviation of six hours. suppose we select a random sample of 144 current students. what is the probability that the mean of this sample is between 19 hours and 20 hours?

Answer 1

Yfhjgjkhjh jhjkkhjkhjhjkhjk hjkhkjhkjhjhj hjkhkjhk hkjh