Rank correlation co-efficient was developed by___________.

Karl Pearson

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C. Spearman

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Francis Cotton

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Carly

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Solution

The correct option is D C. Spearman
Rank correlation coefficient is developed by Charles Spearman, a renowned statistician that measures the strength between the ranked variables.

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Similar questions

Calculate the rank correlation co-efficient between 'X' and 'Y' variables.

$\begin{matrix} X & 10 & 20 & 35 & 14 & 18 & 21 & 16 Y & 15 & 25 & 18 & 19 & 20 & 26 & 27 \end{matrix}$

\frac{Σ f d x d y - \frac{Σ f d x Σ f d y}{N}}{\sqrt{Σ f d x^{2} - \frac{(Σ f d x)^{2}}{N}} \sqrt{Σ f d y^{2} - \frac{(Σ f d y)^{2}}{N}}}

r = 0.6745 \frac{{- r}^{2}}{\sqrt{N}}

r = 1 - \frac{6 Σ d^{2}}{n (n^{2} - 1)}

r = \frac{Σ x y}{N σ x σ y}

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