dolution

The average time that Americans commute to work is 27.7 minutes (Sterling’s Best Places, April 13, 2012). The average commute times in minutes for 48 cities are as follows: Albuquerque 23.3 Atlanta 28.3 Austin 24.6 Baltimore 32.1 Boston 31.7 Charlotte 25.8 Chicago 38.1 Cincinnati 24.9 Cleveland 26.8 Columbus 23.4 Dallas 28.5 Denver 28.1 Detroit 29.3 El Paso 24.4 Fresno 23.0 Indianapolis 24.8 Jacksonville 26.2 Kansas City 23.4 Las Vegas 28.4 Little Rock 20.1 Los Angeles 32.2 Louisville 21.4 Memphis 23.8 Miami 30.7 Milwaukee 24.8 Minneapolis 23.6 Nashville 25.3 New Orleans 31.7 New York 43.8 Oklahoma City 22.0 Orlando 27.1 Philadelphia 34.2 Phoenix 28.3 Pittsburgh 25.0 Portland 26.4 Providence 23.6 Richmond 23.4 Sacramento 25.8 Salt Lake City 20.2 San Antonio 26.1 San Diego 24.8 San Francisco 32.6 San Jose 28.5 Seattle 27.3 St. Louis 26.8 Tucson 24.0 Tulsa 20.1 Washington, D.C. 32.8 a. What is the mean commute time for these 48 cities? b. What is the median commute time for these 48 cities? c. What is the mode for these 48 cities? d. What is the variance and standard deviation of commute times for these 48 cities? e. What is the third quartile of commute times for these 48 cities?