#2.2. The numbers of cars sold by a dealer in a 6-day period were: 4, 8, 10, 8, 12, 14 Find the mean, variance, and standard deviation of car sales. #2.3. Calculate the mean and standard deviation of number of new cars sold per day from the Table below. Table 2.3. Number of cars sold per day. x (number f, (number x, f, x - x (x, -x ) 2 ( x , - * )?f. of cars of days) sold) 0 2 16 2 40 12 5 Total