Question

I need to calculate a test statistic (t).

Answer 1

n=81, standard deviation=.08, null hypothesis=0

Answer 2

the mean I am confused about. the problem is about peripheral vision and playing video games. before playing the video game the mean score is .31. after playing the game the score is .35...i know im doing a t distribution

Answer 3

the answer is one of the following: 1.85, 4.5, 1.67, or 5.25

Answer 4

im getting 34....something isnt right