ANOVA with post hoc multiple pairwise statistical comparison.

ANOVA with post hoc multiple pairwise statistical comparison between compositions of selected unexpanded vermiculite ore.

Detailed Description

Table A3.  ANOVA with post hoc multiple pairwise statistical comparison between compositions of the selected unexpanded vermiculite ore samples and all other unexpanded vermiculite ore samples from the four major historical sources examined in this study.

Notes: Mg fraction = Mg/(Mg+Aloct +Feoct), tetrahedral Al fraction = (Altet + Si), total Al, and total Fe are based on Electron Probe MicroAnalysis (EPMA) of the selected unexpanded ore samples and all unexpanded samples studied from each of the four major historical sources.  Mg=total Mg; oct = octahedral; tet = tetrahedral.

a P is used as an ANOVA (Analysis of Variability) statistical test metric of whether differences in median compositional values of the selected unexpanded samples are statistically distinct from random sampling variability.  A value of P < 0.050 is evidence that the median composition of a sample is statistically distinct from the median compositions of the group of other samples.  A value of P > 0.050 is weak evidence that the median composition of a sample is statistically distinct from median compositions of the other group of samples.  Differences may be due to random variations in composition.  A value of P close to 0.05 indicates that the median composition of a sample may or may not be statistically distinct from the median compositions of the other group of samples.  A value of P near 0.001 provides strong evidence that the median composition of a sample is statistically distinct from the median compositions of the other group of samples.  ANOVA test on ranks performed and multiple pairwise comparisons done using Dunn’s test.

b Median EPMA Mg fraction and total Fe compositional values of the unexpanded Zonolite® 4 sample are statistically distinct from those of the unexpanded samples studied from Enoree.  Specifically, the Zonolite® 4 sample’s Mg fraction is statistically distinct from those for 2 of the 
14 unexpanded samples and its total Fe value is distinct from those for 4 of the 14 unexpanded samples.  

c Median EPMA Mg fraction and tetrahedral Al fractions of the unexpanded Zonolite® 4 sample are statistically distinct from those of the seven unexpanded samples studied from Libby.

d Median EPMA composition values of the selected unexpanded ALB1VA00, Zonolite® 4, and GDS469 samples are statistically distinct from those of the five unexpanded samples studied from Palabora. 

Details

Image Dimensions: 978 x 537

Date Taken:

Location Taken: US