1. Suppose we want to evaluate if there is a difference in population mean ages for...

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1. Suppose we want to evaluate if there is a difference in population mean ages for Titanic passengers in 1st class versus 3rd class. Since we do not have time to research the ages for all 320 1st passengers and all 706 3rd class passenger, we use simple random sampling to select 16 1st class passengers and 35 3rd class passengers. We research the ages for the two samples and summarize the data below: Statistics Variable N Mean 1stClassAges 16 35.875 3rdClassAges 35 25.229 StDev 4.282 17.126 1.478 8.742 SE Mean a. Estimate the population mean age difference for 1st class versus 3rd class passengers, with a bound on the error of estimation. b. Is there evidence that the mean age of 1st class passengers is significantly different from the mean age of 3rd class passengers? Explain your answer using your results above. 1. Suppose we want to evaluate if there is a difference in population mean ages for Titanic passengers in 1st class versus 3rd class. Since we do not have time to research the ages for all 320 1st passengers and all 706 3rd class passenger, we use simple random sampling to select 16 1st class passengers and 35 3rd class passengers. We research the ages for the two samples and summarize the data below: Statistics Variable N Mean 1stClassAges 16 35.875 3rdClassAges 35 25.229 StDev 4.282 17.126 1.478 8.742 SE Mean a. Estimate the population mean age difference for 1st class versus 3rd class passengers, with a bound on the error of estimation. b. Is there evidence that the mean age of 1st class passengers is significantly different from the mean age of 3rd class passengers? Explain your answer using your results above.

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a df s12n1 s22n22s12n12n1 1 s22n22n2 1 17126216 8742235217126216215 8742235234 18 At 95 confidence i... View the full answer