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Table 4 The statistical relationship between occupation rate and length, diameter, volume, and entrance size of artificial nests

From: How effective are artificial nests in attracting bees? A review

  Regression equation R-Sq P-value   r
Bee hotel      
  OR = − 132.4 + 49.49 DI − 4.434 DI^2 + 0.1196 DI^3 13.1% 0.23 LE −0.2
  OR= 61.33 − 5.206 LE + 0.3961 LE^2 − 0.01057 LE^3 5.7% 0.60 DI −0.11
Nest box      
  OR = − 29.70 + 37.77 VO − 9.686 VO^2 + 0.7249 VO^3 25% 0.53 VO 0.18
  OR = 30.39 − 13.66 EN + 3.172 EN^2 −0.1928 EN^3 14.5% 0.72 EN −0.11