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Appendix D
Statistical Analysis Results

Table D-1. Results of the Kruskal-Wallace statistical test between INL Site, Boundary, and Distant sample groups by quarter and by month.

Parameter Pa

Gross Alpha

Quarter

0.0114

April

0.0373

May

0.1009

June

0.4346

Gross Beta

Quarter

0.8300

April

0.4201

May

0.8599

June

0.5269

a. A 'p' value greater than 0.05 signifies no statistical difference between data groups. Values below 0.05 are indicated in red.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Table D-2. Results of multiple comparisons between location groups when medians are shown by the Kruskal-Wallace test to be different.a

Gross Alpha Second Quarter
Depend: Coded Result All Groups Multiple Comparisons p values (2-tailed); Coded Result (2nd-Qtr-18-LVf in 2nd-Qtr-18-LVf.stw) Independent (grouping) variable: Group Kruskal-Wallis test: H (2, N= 206) =8.948199 p =.0114 Include condition: v8="gross alpha"
Boundary R:110.55 Distant R: 108.04 INL Site R:77.487
Boundary   1.000000 0.012432
Distant 1.000000 0.028735
INL Site 0.012432 0.028735
Gross Alpha April
Depend: Coded Result month=4 Multiple Comparisons p values (2-tailed); Coded Result (2nd-Qtr-18-LVf in 2nd-Qtr-18-LVf.stw) Independent (grouping) variable: Group Kruskal-Wallis test: H (2, N= 206) =8.948199 p =.0114 Include condition: v8="gross alpha"
Boundary R:33.679 Distant R: 37.125 INL Site R:20.500
Boundary   1.000000 0.120782
Distant 1.000000 0.034658
INL Site 0.120682 0.034658
  1. Results of the Kruskal-Wallis test in Table D-1 show that at least one of the location group medians was different in the second quarter and in April. The multiple comparison test shown in the tables above identify where the differences are (the estimated p values in red indicate a significant difference between two groups).

 

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