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(b) The random sample of 62 satisfaction ratings yields a sample
mean of formula152_4.mml. Assuming that σ equals 2.69, use critical
values to test H0 versus Ha at each of α = .10, .05, .01, and .001.
(Round your answer z.05 to 3 decimal places and other z-scores to 2
decimal places.) z = Rejection points z.10 z.05 z.01 z.001
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