Table 4. Results from two multiple regression analyses of bee species discovered as a function of study duration (days) and area sampled. (A) The first analysis included all surveys that collected bees from all flowering plants (n = 14). (B) The second analysis removed a single outlying datum (n =13). The table combines regression results with the partial regression coefficients for each parameter in the model.

Parameter
Partial reg. coeff. b’
 MS
df
 Pa
R2, overall model

A) Model with all data
         Model
0.337
3
0.034
0.565
         Error
0.078
10

         Intercept
4.271



         log(days)
0.137
0.015
1
0.673
         log(area)
-0.701
0.191
1
0.149
         log(days) x log(area)
0.206
0.199
1
0.141

B) Model with outlier removed
         Model
0.202
3
0.042
0.581
         Error
0.049
9

         Intercept
3.743



         log(days)
0.303
0.068
1
0.268
         log(area)
0.463
0.033
1
0.433
         log(days) x log(area)
-0.103
0.022
1
0.521
         Error





aSignificance testing was based on type III SS. The response variable was log(species collected). The second model removed a single outlying datum (see text and Table 1 for details).