Students were surveyed to see how often they ate pizza in a month. The results are given here:
| | | | | 0, 1, 1, 1, 2, 2,| 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4,| 4, 4, 4, 5, 5, 5 | | | | | 0 2.5 3 4 5 Min First Quartile Median Third Quartile Max
The five-number summary: 0, 2.5, 3, 4, 5
The mean = Σx/n = 75/25 = 3.0
Range = Maximum - Minimum = 5 - 0 = 5
Interquartile Range = Q3 - Q1 = 4 - 2.5 = 1.5