The average speed of a baseball line drive is 83 miles per hour. Josiah a practiced a new technique to improve his hitting speed. His coach recorded
the speed of 42 random hits during practice and found that his average speed
using the new technique was 84.2 miles per hour, with a standard deviation of
4.7 miles per hour.
Part A: State the correct hypotheses Josiah is trying to prove the new
technique is an improvement over the old technique. (4 points)
Part B: Identify the correct test and check the appropriate conditions. (6
points)
I have the answer to part A i just have no idea how to check my conditions... PLEASE HELP!!!