Table 3 Differences in subgroup and population means
From: Forest carbon program enrollment in Pennsylvania falls below survey predictions
| Â | Normalized mean difference | P-value for one-sample t test | ||||
|---|---|---|---|---|---|---|
| Â | Declined | In process | Enrolled | Declined | In process | Enrolled |
Normalized vegetation index (NDVI), 1985 | 0.142 | 0.080 | −0.017 | 0.000 | 0.000 | 0.249 |
Change in NDVI, 1985–2019 | −0.096 | 0.098 | −0.122 | 0.000 | 0.000 | 0.000 |
Average annual percent forested area cut, 1985–2019 | 0.074 | 0.028 | 0.067 | 0.000 | 0.000 | 0.000 |
Average annual percent forested area cut, 1985–1999 | 0.150 | 0.057 | 0.003 | 0.000 | 0.000 | 0.827 |
Average annual percent forested area cut, 2000–2014 | 0.111 | 0.083 | 0.358 | 0.000 | 0.000 | 0.000 |
Average annual percent forested area cut, 2015–2019 | 0.286 | 0.028 | 0.091 | 0.000 | 0.000 | 0.000 |
Forest area (Ha) | 0.509 | 0.478 | 0.330 | 0.000 | 0.000 | 0.000 |
Forest area: Less than 4 ha | −0.383 | −0.399 | −0.350 | 0.000 | 0.000 | 0.000 |
Forest area: 4–20 ha | −0.060 | −0.019 | 0.054 | 0.000 | 0.007 | 0.000 |
Forest area: 40–79 ha | 0.219 | 0.240 | 0.232 | 0.000 | 0.000 | 0.000 |
Forest area: 80 or more ha | 0.402 | 0.299 | 0.060 | 0.000 | 0.000 | 0.000 |
Distance to road, meters | 0.440 | 0.195 | 0.425 | 0.000 | 0.000 | 0.000 |
Distance to road: Less than 100 m | −0.321 | −0.232 | −0.425 | 0.000 | 0.000 | 0.000 |
Distance to road: 100–249 m | −0.126 | 0.045 | 0.027 | 0.000 | 0.000 | 0.064 |
Distance to road: 250–500 m | 0.117 | 0.108 | 0.149 | 0.000 | 0.000 | 0.000 |
Distance to road: 500 or more meters | 0.344 | 0.073 | 0.251 | 0.000 | 0.000 | 0.000 |
Years owned | 0.035 | −0.226 | −0.326 | 0.002 | 0.000 | 0.000 |
Years owned: Less than 5 years | −0.007 | 0.196 | 0.311 | 0.518 | 0.000 | 0.000 |
Years owned: 5–9 years | −0.047 | 0.009 | 0.070 | 0.000 | 0.238 | 0.000 |
Years owned: 10–14 years | −0.021 | 0.129 | −0.068 | 0.057 | 0.000 | 0.000 |
Years owned: 15 or more years | 0.048 | −0.242 | −0.265 | 0.000 | 0.000 | 0.000 |
Owner is a person, not entity | −0.314 | 0.015 | −0.025 | 0.000 | 0.043 | 0.077 |
Owner’s address is within 40 km of parcel | −0.087 | −0.135 | −0.169 | 0.000 | 0.000 | 0.000 |
