Adopting sustainable energy solutions is vital for rural community development, and ecological researchers continue to analyze which off-grid power sources are most widely integrated. To investigate this, an environmental scientist surveyed households across several remote districts regarding their off-grid infrastructure and energy preferences. A selection of the collected data is presented below.
Table 1: Preference for community-owned microgrids
| Do you prefer community-owned microgrids? | |
|---|---|
| 'yes' | 'no' |
| 165 | 85 |
Table 2: Smart-meter installation by location
| Do you have a smart-meter installed? | ||
|---|---|---|
| 'yes' | 'no' | |
| urban edge | 95 | 35 |
| rural deep | 55 | 65 |
Table 3: Primary off-grid energy source
| Primary Energy Source | Number of households |
|---|---|
| Solar | 85 |
| Wind | 42 |
| Biomass | 28 |
| Hydroelectric | 15 |
| Geothermal | 18 |
| Diesel Generator | 62 |
Using the data in Table 3, calculate the percentage of households who reported 'Wind' as their primary off-grid energy source. Show your workings and present your final answer to 2 significant figures.
513 exam-style questions on OCR A Level Psychology Data recording, analysis and presentation. Each one has a worked solution and a mark scheme showing where the marks go.