In 1912 the luxury liner Titanic struck an iceberg and sank on its first voyage. Some passengers got off the ship in lifeboats, but many died. Here is information about who lived and who died, by gender. Men Women Total Died 680 126 806 Survived 168 317 485 Total 848 443 1291 Now look at the data set comparing gender and survival. 1. Suggest two tests you can do to see if there is a relationship. 2. For each test, clearly formulate the null and alternative hypothesis. Make sure to define any parameters you used when setting up the null and alternative hypothesis.

When there are two independent samples to compare two population means, if we don't know that the population variances are equal, then it does not matter because there are paired samples. do not assume population variances are equal. assume population variances are equal. none of these.

Does it take less time for seeds to germinate if they are near rock music that is continuously playing compared to being near classical music? The time (in days) to germinate was recorded for 30 seeds that were randomly exposed to rock music took and 26 seeds that were randomly exposed to classical music. a. Based on the given information, select ALL that are true about these data. There are two independent random samples of numerical data. Samples are not random. There are two paired random samples of numerical data. Each sample size is large enough. Each population has a normal distribution. At least one sample size is not large enough. Data are not numerical. Each sample data have approximately a normal distribution with no outliers. b. Are all the assumptions met for a two-sample t-test? Yes O No > Next Question to search UP T M365 F2 F3 F4 <400 2 144 64 $ DELL F5 F6 F7 F8 ►11 25 %

4 Cor The following data show the results of two random samples that measured the average number of minutes per charge for AA Lithium-ion (Li-ion) rechargeable batteries versus Nickel-Metal Hydride (NiMH) rechargeable batteries. Click this button to reveal the data. Click again to collapse it. Li-ion NiMH 107 86 95 91 87 89 84 88 89 88 98 87 95 86 85 90 84 91 96 85 97 87 100 89 86 91 102 89 87 94 78 arch If you want to do well, please avoid using Google sheets. Perform a hypothesis test using significance level (a) = .02 to determine if the true average number of minutes per charge for NiMH batteries is different from that for Li-ion batteries. a. Perform a two-sample t test to test the claim that the true average number of minutes per charge for Li-ion batteries is different from that for NiMH batteries. Fill in the blanks for the alternative hypothesis of this test. Select an answer Select an answer Based on your work, answer the following questions. The observed difference in mean…

mts ces urces A group of economists wants to compare the mean annual leave among the US and EU workers. Two samples of US and EU workers were obtained independently and analyzed. The sample of 45 US workers had the mean annual leave of 18.8 days and the standard deviation 9.05 days. The sample of 31 EU workers had the mean annual leave of 25.6 days and the standard deviation 5.38 days. Use 4% level of significance to decide whether there is sufficient evidence that mean annual leave of US workers is less than mean annual leave of EU workers. Procedure: Two means T Hypothesis Test Assumptions: (select everything that applies) Normal populations The number of positive and negative responses are both greater than 10 for both samples Population standard deviations are known Simple random samples Population standard deviation are unknown and not assumed equal Sample sizes are both greater than 30 Independent samples Paired samples Population standard deviation are unknown but assumed equal…

How do the assumptions and characteristics of the linear regression model influence the reliability and robustness of inference drawn from its results in diverse research scenarios?

A group of economists wants to compare the mean annual leave among the US and EU workers. Two samples of US and EU workers were obtained independently and analyzed. The sample of 45 US workers had the mean annual leave of 18.8 days and the standard dediation 9.05 days. The sample of 31 EU workers had the mean annual leave of 25.6 days and the standard deviation 5.38 days. Use 4% level of significance to decide whether there is sufficient evidence that mean annual leave of US workers is less than mean annual leave of EU workers. Procedure: Select an answer Assumptions: (select everything that applies) Normal populations The number of positive and negative responses are both greater than 10 for both samples Population standard deviations are known Simple random samples Population standard deviation are unknown and not assumed equal Sample sizes are both greater than 30 Independent samples Paired samples Population standard deviation are unknown but assumed equal Part 1: Hypothesis Test..…

A group of economists wants to compare the average annual leave among the US and EU workers. Two samples of US and EU workers were obtained independently and analyzed. The sample of 37 US workers had the average annual leave of 18 days and the standard deviation 9.07 days. The sample of 40 EU workers had the average annual leave of 26.8 days and the standard deviation 5.11 days. Use 10% level of significance to decide whether there is sufficient evidence that average annual leave of US workers is less than average annual leave of EU workers. Procedure: Two means T Hypothesis Test Assumptions: (select everything that applies) Population standard deviations are known Population standard deviation are unknown but assumed equal Independent samples Paired samples The number of positive and negative responses are both greater than 10 for both samples Sample sizes are both greater than 30 Population standard deviation are unknown and not assumed equal Normal populations Simple random samples…

LEAVE! A group of economists wants to compare the average annual leave among the US and EU workers. Two samples of US and EU workers were obtained independently and analyzed. The sample of 37 US workers had the average annual leave of 18 days and the standard deviation 9.07 days. The sample of 40 EU workers had the average annual leave of 26.8 days and the standard deviation 5.11 days. Use 10% level of significance to decide whether there is sufficient evidence that average annual leave of US workers is less than average annual leave of EU workers. Procedure: Two means T Hypothesis Test Assumptions: (select everything that applies) Population standard deviations are known Population standard deviation are unknown but assumed equal Independent samples Paired samples D The number of positive and negative responses are both greater than 10 for both samples Sample sizes are both greater than 30 Population standard deviation are unknown and not assumed equal Normal populations Simple random…