Question: A B and C please myopenmath.com The U.S. Center for Disease Control reports that in year 1900, the mean life expectancy is 47.6 years for

A B and C please

myopenmath.com 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 111 whites surveyed, the mean life span was 48.2 years with a standard deviation of 11.2 years and of the 97 nonwhites, the mean life span was 39.6 years with a standard deviation of 14 years. Conduct a hypothesis test at the 0.1 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

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