A data set consists of the ages of the students in an actual class at MCC from the past. This data set was used to form the following frequency distribution table.

Student Ages (in years)	Frequency
0-9	0
10-19	20
20-29	4
30-39	1

1. 1. What is the class width?
   2. List all of the class midpoints (from least to greatest).
   3. In Section 1.3 we learn how to approximate the mean from a frequency distribution table like this one. In this case, we would calculate the mean age of the students in this class to be approximately = 16.9 years. (Double-check this result!) Although this data came from an actual college class, hopefully you agree that this mean age seems to be too low. In order to get a more accurate approximation of the mean, what would you change about the frequency distribution table used to summarize this data?