Compute the critical value z a/2 that corresponds to a 93% level of confidence

How can (square root of 25) ^2 be rewritten?

(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.)

On the first of each month sasha runs a 5k race she keeps track of her times to track her progress her time in minutes is recorded in the table