The U.S. Center for Disease Control reports that in year 1900, the mean life expectancy is 47.6 years for whites and 33 years for nonwhites. (Click here for reference data ) Suppose a survey of randomly selected death records for white and nonwhite people born in 1900 from a certain county is conducted. Of the 124 whites surveyed, the mean life span was 46.9 years with a standard deviation of 12.4 years and of the 89 nonwhites, the mean life span was 36.2 years with a standard deviation of 15.3 years. Conduct a hypothesis test at the 0.05 level of significance to determine whether there was no difference in mean life spans in the county for whites and nonwhites in year 1900. Preliminary: a. Is it safe to assume that nw < 5 % of all white people born in 1900 and nnw < 5 % of all nonwhite people born in 1900? O No O Yes b. Is nw > 30 and nnw 2 30 ? No O Yes Test the claim: a. Determine the null and alternative hypotheses. Ho: µw ? v Hnw Ha: Hw ? v lnw b. Determine the test statistic. Round to four decimal places.

The U.S. Center for Disease Control reports that in year 1900, the mean life expectancy is 47.6 years for whites and 33 years for nonwhites. (Click here for reference data ) Suppose a survey of randomly selected death records for white and nonwhite people born in 1900 from a certain county is conducted. Of the 124 whites surveyed, the mean life span was 46.9 years with a standard deviation of 12.4 years and of the 89 nonwhites, the mean life span was 36.2 years with a standard deviation of 15.3 years. Conduct a hypothesis test at the 0.05 level of significance to determine whether there was no difference in mean life spans in the county for whites and nonwhites in year 1900. Preliminary: a. Is it safe to assume that nw < 5 % of all white people born in 1900 and nnw < 5 % of all nonwhite people born in 1900? O No O Yes b. Is nw > 30 and nnw 2 30 ? No O Yes Test the claim: a. Determine the null and alternative hypotheses. Ho: µw ? v Hnw Ha: Hw ? v lnw b. Determine the test statistic. Round to four decimal places.

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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