Each part (a-d) of this problem gives the population standard deviation a, the statement of a claim about p, the sample size n, and the desired level of significance a. Formulate (i) the hypotheses, (ii) the test statistic Z, and (iii) the rejection region. (The answers to part (a) are provided.)

(a) σ = .085 claim: μ n = 125 α = .025
(b) σ = 8.6 claim μ ‰  80
n = 38
α = .01
(c) σ = 1.23 claim μ ‰  0
n = 40
α = .06

Transcribed Image Text:

X-30 255 (ii) R Z 1.645] z = (iii) R: Z 1.645]