| Method | Purpose | Details |
|---|---|---|
| Decibel (Noise) Meter | To measure noise levels near the newly constructed bypass. | Record noise levels for 30 seconds at regular 100-metre intervals starting from the boundary fence out to 1 kilometre. |
| Questionnaire | To collect opinions of local business owners about traffic changes. | Interview the manager of every 3rd business along the high street until 15 surveys are complete. |
| Environmental Quality Survey | To assess the visual impact of the bypass landscaping. | Complete a bi-polar score sheet at 4 pre-selected locations representing different landscape zones. |
Using Figure 4a, explain one sampling method chosen by the student.
