1. Using the data in the Excel file Atlanta Airline Data, find and interpret 95% confidence intervals for the following: a. Mean difference between scheduled time of arrival and actual arrival time. b. Proportion of flights that arrive early. 2. Using the data in the Excel file MBA Student Survey, find 95% confidence intervals for the mean number of nights out per week and mean number of study hours per week by gender. Based on the confidence intervals, would you conclude that there is a difference in social and study habits between males and females?