KEY TO PRACTICE MIDTERM 2

Problem 1
A.  (Change to what are the Null and Alternative Hypotheses?) 
H₀ :  p = .75
H_a :  p > .75

B.  Margin of Error = .064, CI:  [.736, .864]

Problem 2
A.  .3409
B.  85 customers

Problem 3
752 voters

Problem 4
A. 
B.  .05
C.  75%
D.  25%, 25%, They are equal since they span the same time length in a uniform distribution.
E.  m = 15 minutes

Problem 5
H₀ :  m = 1
H_a :  m not= 1

Problem 6
[682, 718]
There is a 99% chance that the true mean temperature before explosion is between 682 and 718.