|
Group |
Tally |
Frequency |
Relative |
|---|---|---|---|
|
0-4 |
//// |
4 |
0.10 |
|
5-9 |
///// // |
7 |
0.18 |
|
10-14 |
///// ///// ///// |
15 |
0.38 |
|
15-19 |
///// //// |
9 |
0.23 |
|
20-24 |
///// |
5 |
0.13 |
|
Total |
|
20 |
1.02 (rounding error) |

Note the shape of this curve: it is nearly a normal distribution.