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Table 6

Pairwise comparisons to observe effects of time on fecal coli form counts in drinking water at the POU in food establishments of Addis Ababa (n = 250)

Pairwise comparisons
(I) Time(J) TimeMean difference (I–J)Std. errorP-value95% Confidence interval for differencea
Lower boundUpper bound
−0.156* 0.039 0.000 −0.232 − 0.079 
0.156* 0.039 0.000 0.079 0.232 
Pairwise comparisons
(I) Time(J) TimeMean difference (I–J)Std. errorP-value95% Confidence interval for differencea
Lower boundUpper bound
−0.156* 0.039 0.000 −0.232 − 0.079 
0.156* 0.039 0.000 0.079 0.232 

Based on estimated marginal means.

*The mean difference is significant at the 0.05 level.

aAdjustment for multiple comparisons: Bonferroni.

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