The table lists the 1995 profits (in millions of dollars) for a sample of seven airlines. Airline Southwest Continental Northwest Delta U.S. Air Air Jamaica BWIA Profit 182.6 226.0 342.1 510.0 119.3 378.0 54.8 a) Calculate the variance and standard deviation for this dataset. b) Calculate the 5-number summary for this dataset. c) Using the results from Problem Set 3 Question 2, what measures are useful for describing this data Give reasons for your