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Find the (a) mean, (b) modal class, (c) variance, and (d) standard deviation. (1 and 2)

Enrollments for Selected Independent Religiously Controlled 4-Year Colleges Listed below are the enrollments for selected independent religiously controlled 4-year colleges which offer bachelor's degrees only. Construct a grouped frequency distribution with six classes and find the mean and modal class. 1013 1867 1268 1666 2309 1231 3005 2895 2166 1136 1532 1461 1750 1069 1723 1827 1155 1714 2391 2155 1412 1688 2471 1759 3008 2511 2577 1082 1067 1062 1319 1037 2400 Source: World Almanac. Fat Grams Using the weighted mean, find the average number of grams of fat per ounce of meat or fish that a person would consume over a 5-day period if he ate these: Meat or fish Fat (g/oz) 3 oz fried shrimp 3.33 3 oz veal cutlet (broiled) 3.00 2 oz roast beef (lean) 2.50 2.5 oz fried chicken drumstick 4.40 4 oz tuna (canned in oil) 1.751. Exam Scores For 108 randomly selected college students, this exam score frequency distribution was obtained. (The data in this exercise will be used in Exercise 18 in Section 3-2.) Class limits Frequency 90-98 6 99-107 22 108-116 43 117-125 28 126-134 9 2. Automobile Fuel Efficiency Thirty automobiles were tested for fuel efficiency (in miles per gallon). This frequency distribution was obtained. (The data in this exercise will be used in Exercise 20 in Section 3-2.) Class boundaries Frequency 7.5-12.5 12.5-17.5 17.5-22.5 22.5-27.5 27.5-32.5Exam Scores The average score of the students in one calculus class is 110, with a standard deviation of 5; the average score of students in a statistics class is 106, with a standard deviation of 4. Which class is more variable in terms of scores? Suspension Bridges The lengths (in feet) of the main span of the longest suspension bridges in the United States and the rest of the world are shown below. Which set of data is more variable? United States: 4205, 4200, 3800, 3500, 3478, 2800, 2800, 2310 World: 6570, 5538, 5328, 4888, 4626, 4544, 4518, 3970