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Statistics Question: The typical amount of sleep per night for a student follows a bell-shaped distribution with a mean of 7 hours and a standard deviation equal to 1.7 hours. Complete the following sentence... About 68% of students typically sleep between ______ and ______ hours per night.
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|dw:1374035875612:dw| That's all I've got so far. Not even sure it that will help.
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