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The average length of time required to complete a college achievement test is approximately normal with...

The average length of time required to complete a college achievement test is approximately normal with a mean of 65 minutes and a standard deviation of 11 minutes. When should the test be terminated (in minutes) if you wish to allow sufficient time for 80% of the students to complete the test? (Round your answer to two decimal places.)

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Math   Statistics-And-Probability   
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