Nikki G.
asked • 02/22/23Mean and standard deviation help.
A professor knows from past experience that the time for students to complete a quiz is normally distributed with mean 26 minutes and standard deviation 3 minutes.
(a) If the teacher allows 31 minutes for the quiz, what percent of the students will not complete the quiz? (Round your answer to two decimal places.)
(b) Suppose that the teacher wants to allow sufficient time so that 95% of the students will complete the quiz in the allotted time. How much time should be allowed for the quiz? (Round your answer to two decimal places.)
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