Sample interval = Population of contents / 19
2,146 / 19 = 112.9
1st sample point = a random # between 1 and the sample interval. For example: 25
2nd sample point: first sample point plus sample interval = 112.9 + 25 = 137.9
3rd sample point: second sample point plus the sample interval: 112.9 + 137.9 = 250.8
4th sample point: 112.9 + 250.8 = 363.7
- You can round the above number to 113 for convenience.
- Remember to start on the random numbers table with “pin-the-tail- on-the-donkey” method.