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Question

Identify the correct formula for calculating r.


A

r=N(XiYi)(Xi)(Yi)NX2i(Xi)2NY2i(Yi)2

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B

r=N(XiYi)N(Xi)(Yi)NX2i(Xi)2NY2i(Yi)2

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C

r=N(XiYi)(Xi)(Yi)(NX2i(Xi)2)(NY2i(Yi)2)

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D

r=N(XiYi)N(Xi)(Yi)(NX2i(Xi)2)(NY2i(Yi)2)

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Solution

The correct option is A

r=N(XiYi)(Xi)(Yi)NX2i(Xi)2NY2i(Yi)2


r=N(XiYi)(Xi)(Yi)NX2i(Xi)2NY2i(Yi)2
This is the Karl Pearson's formula for calculating r.


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