Table 3.

Summary of statistical results as obtained from a beta regression model fitted to the relative frequency of Brassica napus pollen grains in spring honey

	Relative frequency of Brassica napus pollen grains
Intercept	15.10 ± 7.42*
Study site (test compared to reference)	0.44 ± 0.10***
Distance to OSR (distant compared to edge)	−0.13 ± 0.11
Temperature sum	−0.01 ± 0.01
Humidity sum	0.00 ± 0.00*
Rain sum	0.01 ± 0.01
Wind sum	0.00 ± 0.01
Precision (phi)a	23.68 ± 3.40***

Effect size ± SD is given for each parameter. Positive values indicate an increase in relation to the respective reference value whereas negative values indicate a decrease. All other parameters are as explained in the legend of Table 1. ***p < 0.001, *p < 0.05

^a Precision (phi) is the precision component of the beta distribution, which is related to the variance of the observations. For fixed mean mu, the larger the phi the smaller the variance of the dependent variable