Mathematics, 14.12.2019 00:31 Edrayton
Did you get your 8 hours of sleep last night? " is a common question. in a recent survey of 151 postpartum women, the folks at the national sleep foundation found that the mean sleep time was 7.8 hours, with a standard deviation of 1.4 hours. does the evidence suggest that postpartum women do not get enough sleep? use α = 0.05 level of significance.
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