Statistics
Scientific paper
Apr 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976stin...7725038b&link_type=abstract
Final Report Houston Univ., TX. Dept. of Geology.
Statistics
Basalt, Chemical Composition, Closure Law, Indexes (Ratios), Lunar Rocks, Statistical Correlation, Apollo Project, Lunar Exploration, Lunar Maria, Tables (Data), Trace Elements
Scientific paper
Major element and major element plus trace element analyses were selected from the lunar data base for Apollo 11, 12 and 15 basalt and regolith samples. Summary statistics for each of the six data sets were compiled, and the effects of closure on the Pearson product moment correlation coefficient were investigated using the Chayes and Kruskal approximation procedure. In general, there are two types of closure effects evident in these data sets: negative correlations of intermediate size which are solely the result of closure, and correlations of small absolute value which depart significantly from their expected closure correlations which are of intermediate size. It is shown that a positive closure correlation will arise only when the product of the coefficients of variation is very small (less than 0.01 for most data sets) and, in general, trace elements in the lunar data sets exhibit relatively large coefficients of variation.
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