Mean Comparison

Z

t at 95%
(P = 0.050)

Null
hypothesis
H0 : ų1 = ų2

Result/decision

Estrone

 

 

 

 

u/s vs influent

2.717

2.132

Z > t

Reject H0:  means are different

d/s vs influent

2.861

2.132

Z > t

Reject H0: means are different

u/s vs effluent

1.289

2.132

Z < t

Accept H0: means not different

d/s vs effluent

1.665

2.132

Z < t

Accept H0: means not different

 

 

 

 

 

Estradiol

 

 

 

 

u/s vs influent

2.782

2.132

Z > t

Reject H0: means are different

d/s vs influent

2.992

2.132

Z > t

Reject H0: means are different

u/s vs effluent

1.127

2.132

Z < t

Accept H0: means not different

d/s vs effluent

1.666

2.132

Z < t

Accept H0: means not different
u/s = control sample taken upstream of the Darvill WWW
d/s = control sample taken downstream of the Darvill WWW
Table 3: Statistical data analysis for comparison of mean results for samples and controls
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