Trevor is interested in purchasing the local hardware/sporting goods store in the small town of dove creek, montana. after examining accounting records for the past several years, he found that the store has been grossing over $850 per day about 60% of the business days it is open. estimate the probability that the store will gross over $850 for the following.

(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.)