Bars diagram and Polygon of frequencies
In a survey to $20$ students on the number of cousins they have on their mother's side, the obtained answers are: $$1,4,2,3,0,4,1,3,2,5,4,3,5,2,2,0,3,1,4,5,$$
Make a table with the absolute frequency and the bar graph.
| Number of cousins | Absolute frequency $f_i$ |
| $0$ | $2$ |
| $1$ | $3$ |
| $2$ | $4$ |
| $3$ | $4$ |
| $4$ | $4$ |
| $5$ | $3$ |
| $\sum$ | $20$ |