Table 2 ANOVA model effects across labs

-0.046*

35

0.168*

112

0.175*

20

0.064*

27

-0.111*

14

-0.053*

12

0.044*

43

-0.145*

19

<.001

Quality difference

Sample size

-0.054*

201

0.016

24

0.029*

31

0.229*

42

-0.053*

199

-0.042*

82

<.001