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Making Social Sciences More ScientificThe Need for Predictive Models$
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Rein Taagepera

Print publication date: 2008

Print ISBN-13: 9780199534661

Published to Oxford Scholarship Online: September 2008

DOI: 10.1093/acprof:oso/9780199534661.001.0001

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Geometric Means and Lognormal Distributions

Geometric Means and Lognormal Distributions

(p.120) 9 Geometric Means and Lognormal Distributions
Making Social Sciences More Scientific

Rein Taagepera (Contributor Webpage)

Oxford University Press

Geometric means are often more meaningful than arithmetic means, because they are closer to the central figure (median). When x and y can conceptually take only positive values, their distributions cannot be normal and may be lognormal. When running a normal distribution yields a standard deviation larger than one-half of the mean, one should dump the normal fit and try a lognormal fit instead.

Keywords:   arithmetic means, geometric means, lognormal distribution, median, normal distribution

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