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 one year ago
The time to complete a standardized exam is approximately normal with a mean of 70 minutes and a standard deviation of 10 minutes. How much time should be given to complete the exam so that 90% of the students complete the exam in the allotted time?
 one year ago
The time to complete a standardized exam is approximately normal with a mean of 70 minutes and a standard deviation of 10 minutes. How much time should be given to complete the exam so that 90% of the students complete the exam in the allotted time?

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HereticHalloran
 one year ago
Best ResponseYou've already chosen the best response.0I understand that its a Probability Distribution problem, but I dont know which formula(s) to use to figure this out

tkhunny
 one year ago
Best ResponseYou've already chosen the best response.1M the proper number of minutes to meat the criterion. \((M70)/10 = Z_{90}\) Find the Zvalue with 10% of the Normal Distribution in the right tail. Solve for M.

HereticHalloran
 one year ago
Best ResponseYou've already chosen the best response.0You are awesome. Thank you.
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