Question
7.We measured the length of hospital stay after birth for 400 randomly selected babies. We found...
7.We measured the length of hospital stay after birth for 400 randomly selected babies. We found a mean ?̅=4.5 daysand a standard deviation ?=8.9days .Use a 0.01 significance level to test the claim that the population mean hospital stay for a baby after birth is 2 days.
A. Find the claim, null hypothesis, and alternative hypothesis.
b.What is the significance level for this problem?
c. Find the test statistic. Round to 4 decimal places.
d.Find theP-value. Round to 4 decimal places.
e.Make a decision about?0(either reject or fail to reject), andwrite out a decision about the claim using the table given in step 8 in the note
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