Question: The average length of time required to complete a college achievement test was found to equal 70 minutes with a standard deviation of 12 minutes.

The average length of time required to complete a college achievement test was found to equal 70 minutes with a standard deviation of 12 minutes. When should the test be terminated if you wish to allow sufficient time for 90% of the students to complete the test? (Assume that the time required to complete the test is normally distributed.)

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