Question 315141
First, order your data and separate into appropriate categories
05,07,07,09
13,16,16,17,17,17,18
21,22,22,24
30,31,32,35,38
41
Use the first digit as the stem, the last digit as the leaf.
0|5 7 7 9
1|3 6 6 7 7 7 8
2|1 2 2 4
3|0 1 2 5 8 
4|1
It's a visual frequency distribution.