Answers: 2
Mathematics, 21.06.2019 21:50, zymikaa00
Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least āc.ā using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least ācā?
Answers: 1
Mathematics, 21.06.2019 22:20, skyhighozzie
(b) suppose that consolidated power decides to use a level of significance of Ī± = .05, and suppose a random sample of 100 temperature readings is obtained. if the sample mean of the 100 temperature readings is xāÆāÆ = 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 Ļ = 5. (round your z to 2 decimal places and p-value to 4 decimal places.)
Answers: 2
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