Researchers collected data on the numbers of hospital admissions resulting from

Question

Researchers collected data on the numbers of hospital admissions resulting from motor vehicle crashes, and results are given below for Fridays on the 6th of a month and Fridays on the following 13th of the same month Use a 0 05 significance level to test the claim that when the 13th day of a month falls on a Friday, the numbers of hospital admissions from motor vehicle crashes are not affected What are the hypotheses for this test? Let mu_d be the mean of the differences in the numbers of hospital admissions resulting from motor vehicle crashes for the population of all pairs of data H_0: mu_d = 0 H_1:mu_d notequalto 0 Find the value of the test statistic t = (Round to three decimal places as needed)

Explanation / Answer

Value of test statistic :

t = -3.0715

Before After dbar 9 13 -4 7 13 -6 12 15 -3 12 11 1 3 5 -2 5 11 -6 Mean -3.33333

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