sample size 250 and sample 500

The governor of a state wanted to assess the public education system of the state. She instructed a group of researchers to create a test to assess the knowledge of every high school senior in the state. The researchers administered the tests and found that the average score was 80 points out of 100, with a standard deviation of 38 points. Complete parts (a) through (c) below. . . . . . b. For samples of size 250, find the mean - and standard deviation of of all possible sample mean test scores. Hi = (Type an integer or a decimal.) OX = (Round to one decimal place as needed.) c. Repeat part (b) for samples of size 500. He = [ (Type. an integer or a decimal.)