Exact(8)
Following Ferreira and Gignoux (2011, 2013) definitions and calculations, we compute here the overall effect of (our own defined set of) circumstances on the final educational attainment of individuals and construct an index of inequality of opportunity, a scalar that measures the proportion of the whole variance that is explained by the set of pre-defined circumstances.
We chose the principal factor method, because we presumed that the factors would not explain the whole variance of the analyzed diagnosis groups.
Alternatively, the whole variance matrix can be used in the calculations.
The first 20 principal components (PCs), which accounted for more than 90% of the whole variance, were used in the analyses.
However, when the whole variance matrix was used in the calculations (instead of using only regression parameters to calculate the WLS statistic), the sizes of WLS 0.95 confidence sets did not change (not shown).
The first principal component (accounting for 37% of the whole variance) clearly separates Canarian aborigines and Africans from the present-day Canary and Iberian samples, leaving the historical sample in an intermediate position.
Similar(52)
With respect to plasma ornithine, the study had 80% power (α, set at 0.05) to detect a 160 μM difference in the fetal plasma concentration of ornithine, analyzed in a split-plot design with maternal diet as the whole plot (variance, 26,310) and fetal sex as the subplot (variance, 27,504) and with n = 15 replicates/group.
Within all F2 families, predictions were extremely good, allowing the explanation of nearly the whole genetic variance.
On the other hand, the low covariation between variables hypothetically related to intensity of sibling competition (see above) would suggest that these factors might explain different portions of whole variance in sibling competition.
Final variance estimation is a weighted average between traditional variance estimation value and the whole data set variance estimation.
We were only able to include one to three males per island or mainland location to the analyses, so our estimates of genetic variance indicate the variance among the whole island system, not variance within single islands.
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