Use the data on educational level in Chapter 2, Exercise 4, for this problem.
Years of Education Frequency
0 ........................................ 2
2 ........................................ 2
3 ........................................ 1
4 ........................................ 4
5 ........................................ 2
6 ........................................ 8
7 ........................................ 7
8 ........................................ 15
9 ........................................ 23
10 ........................................ 33
11 ........................................ 38
12 ........................................ 207
13 ........................................ 58
14 ........................................ 102
15 ........................................ 33
16 ........................................ 127
17 ........................................ 30
18 ........................................ 36
19 ........................................ 17
20 ........................................ 30
a. What level of measurement is "years of education"? Why can you use a histogram to graph the distribution of education, in addition to a bar chart?
b. Construct a histogram for years of education, using equal-spaced intervals of 4 years. Don't use percentages in this chart.