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PSYC 3002- 8. Research has shown that Americans sleep an average of 7.2 hours per night, but we do not know the standard deviation. Does

PSYC 3002- 8. Research has shown that Americans sleep an average of 7.2 hours per night, but we do not know the standard deviation. Does a sample of Walden undergraduate students sleep a different amount of time than the population mean of 7.2 hours per night

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