Question 3 (18 points) Listen 3. (18 points) Student enrollments in a sample of classes at ASU this term were summarized as follows: student enrollment frequency 10 - 14 15 - 19 20 - 24 25 - 29 30 - 34 7 10 12 4 2 With the summarized data above: (a) Estimate the sample mean in 1 decimal point. Clearly show your steps and manual (hand and a calculator) calculations in 1 decimal point. (b) Estimate the sample standard deviation in 1 decimal point. Clearly show your steps and manual calculations in 1 decimal point (c) Interpret your estimated sample mean in (a) above