Question

hand correlation

given a data set of x and y, how do you find a correlation? with example.

Answer 1

Sol:

Let X and Y be

X   Y
25   2
9   7
14   1
101   10
13   8
24   3
10   0.6

heren=number of pairs of oservations=7

pearson correlation coeffcient is given by formuala

r=((7*1319)-(196*31.6))/sqrt((7*11948-196^2)*(7*227.36-31.6^2))

r=0.5869619

there exists moderate positive relationship between x and y