|
Site
|
Period (k.y.)
|
N
intervals |
N
green layers |
N
classes |
Degrees of
freedom |
Calculated
 2
|
2 (5% level of significance) |
|---|---|---|---|---|---|---|---|
| 1143 | 0-1105 | 221 | 345 | 7 | 4 | 4.553 | 9.488 |
| 1145 | 0-1005 | 201 | 171 | 6 | 3 | 32.967 | 7.815 |
| 1146 | 0-860 | 200 | 108 | 5 | 2 | 32.757 | 5.991 |
| 1148 | 0-1085 | 217 | 252 | 6 | 3 | 14.166 | 7.815 |
Notes: Only for Site 1143 we fail to reject the null hypothesis (green layers follow a Poisson random distribution). For the other sites, we have to reject randomness. 
t interval = 5 k.y. N = number.