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Appendix D
Statistical Analysis Results

Table D-1. Results of the Kruskal-Wallace one-way analysis of variance by ranks between INL Site, Boundary, and Distant sample groups by quarter and by month.

Gross Alpha
Quarter Valid N Sum of ranks Mean rank Ha pb
Boundary 91 8882.000 97.6044 1.8550 0.3955 
Distant 77 8413.000 109.2597
INL Site 39 4233.000 108.5385
January Valid N Sum of ranks Mean rank H p
Boundary 35 1331.500 38.04286 0.7195 0.6978
Distant 30 1261.000 42.03333
INL Site 15 647.500 43.16667
February Valid N Sum of ranks Mean rank H p
Boundary 28 798.0000 28.50000 1.8800 0.3906
Distant 23 811.000 35.26087
INL Site 12 407.0000 33.91667
March Valid N Sum of ranks Mean rank H p
Boundary 28 881.0000 31.46429 0.2334 0.8899
Distant 24 784.5000 32.68750
INL Site 12 414.5000 34.54167
Gross Beta
Quarter Valid N Sum of ranks Mean rank H p
Boundary 91 9723.500 106.8516 3.7234 0.1554
Distant 77 7277.500 94.5130
INL Site 39 4527.000 116.0769
January Valid N Sum of ranks Mean rank H p
Boundary 35 1467.500 41.92857 1.1470 0.5635
Distant 30 1111.500 37.05000
INL Site 15 661.000 44.06667
February Valid N Sum of ranks Mean rank H p
Boundary 28 945.5000 33.76786 3.0361 0.02191
Distant 23 621.0000 27.00000
INL Site 12 449.5000 37.45833
March Valid N Sum of ranks Mean rank H p
Boundary 28 902.0000 32.21429 0.6734 0.7141
Distant 24 742.5000 30.93750
INL Site 12 435.5000 36.29167

a. H = Kruskal Wallis test statistic calculated using mean ranks. This test assumes H is approximately distributed as Χ2 .

b. A p-value (probability value) greater than 0.05 signifies no statistical difference between data groups. Any values below 0.05 are indicated in red.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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