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whites surveyed, the mean life span was 49 years with a standard deviation of 12.1 nonwhites, the mean life span was 40.3 years with a standard deviation of 14.4 year test at the 0.1 level of significance to determine whether there was no difference in 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? Yes O No b. Is nw > 30 and nnw > 30 ? O No Yes Test the claim: a. Determine the null and alternative hypotheses. Họ: Hu Ha: Hu ? v Hnw b. Determine the test statistic. Round to four decimal places. t c. Find the p-value. Round to 4 decimals. p-value AMako - desicion

whites surveyed, the mean life span was 49 years with a standard deviation of 12.1 nonwhites, the mean life span was 40.3 years with a standard deviation of 14.4 year test at the 0.1 level of significance to determine whether there was no difference in 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? Yes O No b. Is nw > 30 and nnw > 30 ? O No Yes Test the claim: a. Determine the null and alternative hypotheses. Họ: Hu Ha: Hu ? v Hnw b. Determine the test statistic. Round to four decimal places. t c. Find the p-value. Round to 4 decimals. p-value AMako - desicion

MATLAB: An Introduction with Applications
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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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 3) Suppose a survey of randomly selected death records for white and nonwhite people born in 1900 from a certain county is conducted. Of the 119 whites surveyed, the mean life span was 49 years with a standard deviation of 12.1 years and of the 88 nonwhites, the mean life span was 40.3 years with a standard deviation of 14.4 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 < 5% of all white people born in 1900 and nnw < 5 % of all nonwhite people born in 1900? Yes O No b. Is ny > 30 and nw > 30 ? ONo O Yes Test the claim: a. Determine the null and alternative hypotheses. Ho: Hu ? Hnw Ha: Hu? v Hnw b. Determine the test statistic. Round to four decimal places. t c. Find the p-value. Round to 4 decimals. p-value = d. Make a decision. O Reject the null hypothesis. O Fail to reject the null hypothesis. e. Write the conclusion. O There is sufficient evidence to support the claim that whites and nonwhites have different mean life spans. O There is not sufficient evidence to support the claim that whites and nonwhites have different mean life spans.
Transcribed Image Text: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 3) Suppose a survey of randomly selected death records for white and nonwhite people born in 1900 from a certain county is conducted. Of the 119 whites surveyed, the mean life span was 49 years with a standard deviation of 12.1 years and of the 88 nonwhites, the mean life span was 40.3 years with a standard deviation of 14.4 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 < 5% of all white people born in 1900 and nnw < 5 % of all nonwhite people born in 1900? Yes O No b. Is ny > 30 and nw > 30 ? ONo O Yes Test the claim: a. Determine the null and alternative hypotheses. Ho: Hu ? Hnw Ha: Hu? v Hnw b. Determine the test statistic. Round to four decimal places. t c. Find the p-value. Round to 4 decimals. p-value = d. Make a decision. O Reject the null hypothesis. O Fail to reject the null hypothesis. e. Write the conclusion. O There is sufficient evidence to support the claim that whites and nonwhites have different mean life spans. O There is not sufficient evidence to support the claim that whites and nonwhites have different mean life spans.
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