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Maths-

General

Easy

Question

If correlation between x and y is r, then between y and x correlation will be

– r
1/r
r
1-r

The correct answer is: r

It is obvious.

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If r=-0.97, then

If r=-0.97, then

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If r=0.2, then linear correlation will be necessarily

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Karl Pearson's coefficient of rank correlation between the ranks obtained by ten students in Mathematics and Chemistry in a class test as given below is

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Karl Pearson's coefficient of correlation between x and y for the following data is

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If the mean of the numbers 27+x, 31+x, 89+x, 107+x,156+x, is 82, then the mean of 130+x, 126+x, 68+x, 50+x, 1+x is

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Compute the median from the following table

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parallel

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