1. Rejecting a true null hypothesis is a

A. Type I error

B. Type II error

C. Type III error

D. The correct decision

2.

Ho : M = 75

Ha: M ≠ 75

Sample shows

X bar = 80

s = 14

n = 49

Alpha = .05

A. t critical = _________________

B. t calculated = _______________

C. Decision is