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Please show your work - the answer is d) but I'm not sure why. Thank you! The...

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Basic Math

Please show your work - the answer is d) but I'm not sure why.Thank you!

The time it takes to complete a Sta220 term test is normallydistributed with a mean

of 100 minutes with standard deviation of 14 minutes. How muchtime should be

allowed if we wish to ensure that at least 9 out of 10 students(on average) can

complete it? (round to the nearest minute)

A) 115

B) 116

C) 117

D) 118

E) 119

Answer & Explanation Solved by verified expert
4.5 Ratings (845 Votes)
SolutionGiven The time it takes to complete a Stat220 term test isnormally distributed with a mean of 100 minutes with    See Answer
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