Question

Karl Pearson's coefficient of correlation between the marks in English and Mathematics by ten students will be

Marks in English :	20	13	18	21	11	12	17	14	19	15
Marks in Maths :	17	12	23	25	14	8	19	21	22	19

• A. 0.75
• B. – 0.75
• C. 0.57
• D. None of these

Answer 1

Answer: (A)

0.75

Answer 2

Use $r = \frac{\sum(x - \bar{x})(y - \bar{y})}{\sqrt{\sum(x - \bar{x})^{2}\sum(y - \bar{y})^{2}}}$.