Question

ten students got the following percentages of marks in statistics at a degree examination and at a competitive examination. student:1,2,3,4,5,6,7,8,9,10. marks in degree examination:78,40,94,2276,84,90,62,65,39. marks in competitive examination:84,51,91,60,68,62,86,58,53,43. calculate the coefficient of co-relation​

Answer 1

Step-by-step explanation:

ANSWER

Percentage marks in the examination-

English=50

Accounts=75

Economics=60

B.Std=80

Hindi=55

Weight allotted to each subjects are-

English=2,Accounts=3,Economics=3,B.std=2 and Hindi=1

Mean=

Sum of all observation

sum of all observation value

∴ Weight mean=

2+3+3+2+1

50×2+75×3+60×3+80×2+55