Question

Find out Karl Pearson’s coefficient of correlation between X and Y series:

X series : 17 18 19 19 20 20 21 21 22 23

Y series : 12 16 14 11 15 19 22 16 15 20​

Answer 1

Answer:

ANSWER

Let the assumed mean for the first variate x be 5 and that for the second variate y be 10.

Here n=9

x          y        u=x−5               v=y−10                              u2                                    v2                                     uv16−4−416161625−3−59251537−2−349649−1−1111580−2040610101007112141281333999912421648∑u=0∑v=−9∑u2=