Question #79669
A child welfare officer assets that the mean sleep of young babies is 4 hours a day. A random sample of 64 babies show that their mean sleep was only 13 hours 30 minutes with a standard deviation of 3 hours. at 5 % level of significance ,test the assertion that mean sleep of babies is less than 14 hours a day
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2018-08-09T09:27:08-0400
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