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Table 2

Hypothesis testing summary of the Mann–Whitney test

Null hypothesisTestSignificanceDecision
The distribution of COD removal efficiency is the same across categories of Groups. Independent-samples Mann–Whitney U test 0.00 Reject the null hypothesis 
The distribution of colour removal efficiency is the same across categories of Groups. Independent-samples Mann–Whitney U test 0.00 Reject the null hypothesis 
The distribution of turbidity removal efficiency is the same across categories of Groups. Independent-samples Mann–Whitney U test 0.00 Reject the null hypothesis 
The distribution of SS removal efficiency is the same across categories of Groups. Independent-samples Mann–Whitney U test 0.00 Reject the null hypothesis 
Null hypothesisTestSignificanceDecision
The distribution of COD removal efficiency is the same across categories of Groups. Independent-samples Mann–Whitney U test 0.00 Reject the null hypothesis 
The distribution of colour removal efficiency is the same across categories of Groups. Independent-samples Mann–Whitney U test 0.00 Reject the null hypothesis 
The distribution of turbidity removal efficiency is the same across categories of Groups. Independent-samples Mann–Whitney U test 0.00 Reject the null hypothesis 
The distribution of SS removal efficiency is the same across categories of Groups. Independent-samples Mann–Whitney U test 0.00 Reject the null hypothesis 

Notes: Asymptotic significance is displayed. The significance level is 0.050.

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