The true average diameter of ball bearings of a certain type issupposed to be 0.5 inch.
What conclusion is appropriate when testing H0: μ =0.5 versus Ha: μ ≠0.5 inch in each of the followingsituations?
(a)Â Â Â Â
n = 15, t = 1.8, α = 0.05
1. Reject H0
2.Fail to rejectH0Â Â Â Â
(b)Â Â Â Â
n = 15, t = −1.8, α = 0.05
1. Reject H0
2. Fail to rejectH0Â Â Â Â
(c)Â Â Â Â
n = 27, t = −2.5,α = 0.01
1. Reject H0
2. Fail to rejectH0Â Â Â Â
(d)Â Â Â Â
n = 27, t = −3.7
1. Reject H0 at any reasonable significancelevel
2. Fail to reject H0 at any reasonablesignificance level   Â
