Statistical Stationarity of Sediment Interbed Thicknesses in a Basalt Aquifer, Idaho National Laboratory, Eastern Snake River Plain, Idaho

Scientific Investigations Report 2008–5167

U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2008–5167

Table 10. Results of nonparametric tests of similarity of sediment thickness medians, variances, and distribution shapes between two independent data sets interpreted from natural-gamma logs, Idaho National Laboratory, Idaho.

[Selected data from Anderson and Liszewski (1997) and data gathered in this study. Abbreviations: M-W, Mann-Whitney test of similarity of medians; L, Levene’s test of similarity of variances; K-S, Kolmogorov-Smirnov test of similarity of distribution shape; p-value, probability value; vs., versus]

Sedimentary interbed thicknesses of composite units 1–7			Test	p-value	Number of measurements from samples
1		2	Test	p-value	1	2
Anderson and Liszewski (1997)	vs.	This data set (interpreted from natural-gamma logs)	M-W	0.120	74	60
			L	0.548	74	60
			K-S	0.052	74	60

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