November 30, 2015

Homework Help: Statistics

Posted by Michael on Saturday, November 9, 2013 at 9:08am.

According to a study by the Centers for Disease Control, the national mean hospital stay after childbirth is 2.1 days. Reviewing records at her own hospital, a hospital administrator calculates that the mean hospital stay for a random sample of 81 women after childbirth is 2.3 days with a standard deviation of 1.2 days.

Test the claim that the mean hospital stay after childbirth for this hospital is significantly longer than the national mean of 2.1 days.

What is the p-value?

A) 0.9312
B) 0.0688
C) 0.1376
D) 0.164

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