Question 1. The weekly excess death rate for each city is the sample mean of the data from several reporting stations (hospitals, clinics, etc.) within a 50 mile radius of the city. Determine the 95% CI for the mean week 7 excess death rate in the city with the highest reported week 7 excess death rate. Assume this city receives data from n = 38 reporting stations and that the sample standard deviation s = 463.

lower bound

upper bound

Are the New York City and Pittsburgh mean week 7 excess death rates significantly different? Perform a 2-tail hypothesis test for mu(NYC)- mu(PITT). Assume n(NYC) = 50, n(Pitt) = 35, s(NYC) = 239, s(Pitt) = 214. DO NOT use the approximation minimum(n1-1, n2-1) for the degrees of freedom.

Question 2a. What is the value of the test statistic for this hypothesis test?

Question 2b. Select the correct choice concerning the P-value for this hypothesis test.

P-value?0.0001

0.001?P-value?.01

P-value?0.05

0.02?P-value?0.04

0.10?P-value?0.15

Question 2c. What is the correct conclusion for this hypothesis test?

Reject the null hypothesis and conclude that the mean week 7 excess death rates are different. There is evidence that Pittsburgh's mean week 7 death rate is higher than New York's.

Do not reject the null hypothesis; there is no significant difference in the mean week 7 excess death rates.

Accept the null hypothesis; the mean week 7 excess death rates are equal.

Reject the null hypothesis and conclude that the mean week 7 excess death rates are not significantly different.

1918 Spanish Flu Pandemic excess weekly death rate (annual basis) per 100,000 8000 6000+ city BUFFALO CHICAGO NASHVILLE 4000+ NEW ORLEANS NEW YORK PITTSBURGH 2000 5 6 Week 1:week ending 14-Sep. 1918.. Week 7:week ending 26-Oct. 1918