A journal reported a study examining the possible impact of air pollution on the weight of babies. Researchers found that 9% of 174 babies bon to mothers who were exposed to heavy doses of air pollution in a city were classified as having low birthweight. Only 5% of 2300 babies bom in another hospital in the city whose mothers had not been exposed to air pollution were similarly classified. Does this indicate a possibility that air polution might be linked to a significantly higher proportion of low-weight babies? a) Test an appropriate hypothesis at a= 0.10 and state your conclusion. b) If you concluded there is a difference, estimate that difference with a confidence interval and interpret that interval in context. State the conclusion. Reject Ho. There sufficient evidence at the a = 0.10 level of significance to conclude that the population proportion of low-weight babies born to mothers who were exposed to air pollution is greater than the is population proportion of low-weight babies bom to mothers who were not exposed to air pollution. b) Find the confidence interval for the difference of two proportions, p, -P2 corresponding to the test in part a, as needed. Select the correct answer below and, if necessary, fill in the answer boxes within your choice. O A. The confidence interval is ( D. (Use ascending order. Round to three decimal places as needed.) O B. It was concluded that there is no difference in the proportions. Interpret the interval as needed. Select the correct answer below and, if necessary, fill in the answer. boxes within your choice. O A. For % of samples, the proportion of low-birthweight babies will be between % and % higher for mothers exposed to high levels of air pollution than those who are not. (Use ascending order. Round to one decimal place as needed.) O B. One can be % confident that the sample proportion of low-birthweight babies will be between % and % lower for mothers exposed to high levels of air pollution than those who are not. (Use ascending order. Round to one decimal place as needed.) O C. One can be % confident that the population proportion of low-birthweight babies will be between % and % higher for mothers exposed to high levels of air pollution than those who are not. (Use ascending order. Round to one decimal place as needed.) O D. It was concluded that there is no difference in the proportions.