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Table 4

Pairwise comparisons to observe effects of time on the number of colony 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
−4.467* 1.883 0.019 −8.194 −0.740 
4.467* 1.883 0.019 0.740 8.194 
Pairwise comparisons
(I) time(J) timeMean difference (I–J)Std. errorP-value95% Confidence interval for differencea
Lower boundUpper bound
−4.467* 1.883 0.019 −8.194 −0.740 
4.467* 1.883 0.019 0.740 8.194 

Based on estimated marginal means.

aAdjustment for multiple comparisons: Bonferroni.

*The mean difference is significant at the 0.05 level.

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