| i | x (minutes) |
fi | pi | npi | (fi-npi) |  |
|---|---|---|---|---|---|---|
| 1 | 0-1 | 42 | 0.501 | 49.092 | -7.092 | 1.025 |
| 2 | 1-2 | 33 | 0.250 | 24.500 | 8.500 | 2.949 |
| 3 | 2-3 | 14 | 0.125 | 12.227 | 1.773 | 0.257 |
| 4 | 3-4 | 5 | 0.062 | 6.102 | -1.102 | 0.199 |
| 5 | 4 above | 4 | 0.062 | 6.079 | -2.079 | 0.711 |
| Total | 98 | 1.000 | 98.000 | 0.000 | 5.141 |
Note: i is each interval;
x is the arrival number per minute.