Question: Let X denote the number of days with snowfall of at least 1 inch in a winter. During the past 121 winters, Twin Cities, MN has observed a mean of X‾Tc = 14.4 days and a sample standard deviation of sTc = 5.27 days; during the past 61 winters, Eau Claire, WI has observed a mean of X‾Ec = 14.9 days and a sample standard deviation of sEc = 5.20 days. Assume that the data from Twin Cities and Eau Claire are independent. Construct a 90% confidence interval for σTc/σEc, where σTc and /σEc How are the population standard deviations for Twin Cities and Eau elaire, respectively.