5. [-/5 Points] DETAILS STATSQC1 18.1B.009.CH. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER In a study using data from the Danish Twin Registry, it is claimed that twins (specifically male twins) live longer than singletons. You decide to run a test to see if this is true in the United States. You randomly sample the death records in New York City of 60 males who were born with a twin and 100 males who were born as a single birth. (a) If the mean life expectancy for all 160 males was 78.5 years with a population standard deviation of o = 4.2 years, calculate a confidence interval for the mean life expectancy (in years) of all males. (Use a table or technology. Round your answers to two decimal places.) (b) What would be the appropriate null and alternative hypotheses? HaiHT - HS = 0 OHOilly - HS = 0 OHO:HT - HS = 0 HaiHT - HS # 0 OHO:HT - HS =0 (c) If after conducting the test you found a t score of 1.62 and a P-value of 0.055, what would be the appropriate conclusion if you were using a significance level of 0.05? Because 0.055 > or, we reject the null hypothesis. Because the 0.055 ox, we fail to reject the null hypothesis. Because the 0.055 ox, we reject the null hypothesis. Because the 0.0117 ox, we fail to reject the null hypothesis. Because the 0.0117