## Source

Center for Disease Control, Atlanta, Georgia.

## References

Kitchens, L. J. (2003) *Basic Statistics and Data Analysis*.
Pacific Grove, CA: Brooks/Cole, a division of Thomson Learning.

## Examples

```
stem(Vaccine$number, scale = 2)
#>
#> The decimal point is 1 digit(s) to the right of the |
#>
#> 0 | 45912
#> 2 | 585
#> 4 | 5
#> 6 | 4
#> 8 |
#> 10 |
#> 12 | 9
#>
fn <- fivenum(Vaccine$number)
fn
#> [1] 3.9 10.2 24.8 45.1 138.8
iqr <- IQR(Vaccine$number)
iqr
#> [1] 34.9
```