Population distribution, settlement patterns and accessibility across Africa in 2010.

PLoS One · 2012 · PMC3283664 · PMID 22363717

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a negative trendno p-value reported

The relationship presents a negative trend, as a lower skewness generally means a higher proportion of people in relatively inaccessible areas.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.