AP Statistics Quiz 10.2 1. Name: Mrs. Toguchi wants to determine if politicians tend to have higher salaries, on average, t responders (specifically emergency medical technicians, EMTs). Independent random sa of these two professions were selected and their salaries were recorded. The data are su 2. A study of iron deficiency among infants compared blood hemoglobin levels of a random sample of infants who had been breast-fed to a random sample of infants who had been fed with standard infant formula. Here are the results. n X S Breast-fed infants 23 13.3 1.7 Formula-fed infants 19 12.4 1.8 We want to test Ho HB-HF =0, H, HB-HF 0, where μ, and μ are the population mean blood hemoglobin levels for breast-fed and formula-fed infants, respectively. (a) What additional information would you need to confirm that the conditions for this test have been met? EMTS $54,529 $5,551 100 of two-sample t e in the true (b) Assume the conditions have been met. Calculate the standardized test statistic and P-value for this test. Bib sd not fav (c) What conclusion would you make at the α = 0.05 significance level? (d) Given your conclusion in part (c), which type of error, Type I or Type II, could you have made? Describe that error in the context of this study.

AP Statistics Quiz 10.2 1. Name: Mrs. Toguchi wants to determine if politicians tend to have higher salaries, on average, t responders (specifically emergency medical technicians, EMTs). Independent random sa of these two professions were selected and their salaries were recorded. The data are su 2. A study of iron deficiency among infants compared blood hemoglobin levels of a random sample of infants who had been breast-fed to a random sample of infants who had been fed with standard infant formula. Here are the results. n X S Breast-fed infants 23 13.3 1.7 Formula-fed infants 19 12.4 1.8 We want to test Ho HB-HF =0, H, HB-HF 0, where μ, and μ are the population mean blood hemoglobin levels for breast-fed and formula-fed infants, respectively. (a) What additional information would you need to confirm that the conditions for this test have been met? EMTS $54,529 $5,551 100 of two-sample t e in the true (b) Assume the conditions have been met. Calculate the standardized test statistic and P-value for this test. Bib sd not fav (c) What conclusion would you make at the α = 0.05 significance level? (d) Given your conclusion in part (c), which type of error, Type I or Type II, could you have made? Describe that error in the context of this study.