20. which of the following is true about the blood alcohol level (bal)
measurement?
a. the same amount of alcohol always produces the same bal.
b. the same bal always produces the same level of impairment.
c. the presumptive limit for driving in florida is a .08 bal.
d. all of the above

(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.)