Table 4.

This table refers to the exposure Experiment  1b (graphite shielding; see text) with Euglena viridis on Paramecium caudatum and displays the results of an analysis of variance based on final population size. The ANOVA table displays the sum of squares (SS), degrees of freedom (df), the F-ratio, and the probability of error (prob > F).

Source	df	SS	F-ratio	Prob > F
Repeating the experiment (RE)	1	1.256	38.727	<0.0001∗∗∗∗
Euglena (y/n)	1	0.127	5.862	0.0053∗∗
RE × Euglena	1	0.063	0.966	0.459

^∗∗ P < 0.01, ^∗∗∗∗ P < 0.0001.