Given information
Use the following information to answer the next 
exercises: The U.S. Center for Disease Control reports that the mean life expectancy was 
years for whites born in 
and 
years for nonwhites. Suppose that you randomly survey death records for people born in in a certain county. Of the 
whites, the mean life span was 
years with a standard deviation of 
years. Of the 
nonwhites, the mean life span was 
years with a standard deviation of 
years. Conduct a hypothesis test to see if the mean life spans in the county were the same for whites and nonwhites.
Step-by-step explanation
From the hypothesis test, we can say that the means are not the same because the null hypothesis signifying the same mean is rejected at a 
level of significance.
Therefore, the means are not the same.
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Introductory Statistics
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