A statistician for a chain of department stores created the following stem-and-leaf plot showing the number of pairs of glasses at each of the stores: ∣ 0 1 2 3 4 ∣ 9 3 6 6 8 1 2 3 5 6 9 0 1 2 3 3 5 7

(b) suppose that consolidated power decides to use a level of significance of α = .05, and suppose a random sample of 100 temperature readings is obtained. if the sample mean of the 100 temperature readings is x⎯⎯ = 60.990, test h0 versus ha and determine whether the power plant should be shut down and the cooling system repaired. perform the hypothesis test by using a critical value and a p-value. assume σ = 5. (round your z to 2 decimal places and p-value to 4 decimal places.)