Question

5. Following information was collected from a
survey of 9 students regarding their marks in
Accountancy (X) and their marks in Statistics
(Y) in 10 mark test in each subject:
2(x - 2) = 20, Ely - 3) = 25, 2(x - 3) (y - 4) = 46,
2(x - 5)2 = 53, Ily + 3)2 = 721.
Find the coefficient of correlation between X
and Y.​

Answer 1

Step-by-step explanation:

Arranging the given data in ascending order

20,33,39,40,50,53,59,65,69

Here, n=9(odd)

Median M=Value of 5

th

observation

So, Median is 50.

Now, mean deviation above median=

n

1

∑∣x

i

−M∣

=

9

114

=12.67