Scientific Investigations Report 2006–5316

U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2006–5316
DOE/ID-22201

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Table 3. Results of nonparametric tests of similarity of median sediment content between groups of younger and older composite units, where sediment content is expressed as sediment thickness.

[Abbreviations: Ka, thousands of years; M-W, Mann-Whitney test of similarity; K-W, Kruskal-Wallis test of similarity; p-value, probability value; vs., versus]

Groupings of
composite units 		Time spans
compared
(Ka)		 Test of
similarity
p-value
2 – 7 vs. 8 – 14 550 vs. 1,800 0.792 (M-W)
2 – 5 vs. 6 – 7 vs. 8 – 14 330 vs. 220 vs. 1,800 .221 (K-W)
2 vs. 3 – 7 vs. 8 – 14 100 vs. 350 vs. 1,800 .898 (K-W)

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