Table 4 Analysis of variance (ANOVA) for the model of log total VOCs on the fixed effects of activity and ventilation and the random effects of shop and shift within shop with the Kenward-Roger degrees of freedom method.

From: Characterizing full-shift worker exposures to VOCs in small-sized auto repair shops in the Tucson, Arizona, USA metropolitan area

 

SS

MS

Num df

Den df

F value

P-value

Activity

259.4

43.2

6

840.6

8.8

2.90 × 10–9

Ventilation

11.2

5.6

2

848.6

1.1

0.32

  1. Note that these are Type III sums of squares, which is the SS given all other effects in the model. SS: sum of squares; MS: mean squares; Num df: numerator degrees of freedom; Den df: denominator degrees of freedom.
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