Just B and C which is interpret this interval for a traveler planning to fly

What are the chances your flight will leave on time? To the right are a histogram and summary statistics for the n 72 percentage of flights departing on time each month from 2012 thru 2017. There is no evidence of a trend over time. - N (The correlation of On Time Departure % with time is r = 0.019.) Complete parts a through c below. Y 80.2083 # of Months S 2.68204 . . .. . Is the nearly normal condition met? Yes O No b) Find a 90% confidence interval for the true percentage of flights that depart on time.