1. Using the given data set, find (a) the sample mean, (b) the sample standard deviation, (c) construct a 98% confidence interval for the population mean μ. Assume the data set is normally distributed.The monthly incomes for 14 randomly selected people, each with a bachelor’s degree in economics (adapted from U.S. Bureau of Labor Statistics)5418.76 5278.63 5912.05 6118.35 5647.86 5714.385365.19 5524.91 5761.57 4924.16 5494.66 5619.746205.64 5801.23