Karl Pearson’s Correlation Coefficient

Prudhwi Raj Krishna V

09-04-2022

What is correlation?

Correlation is a statistical term describing the degree to which two variables move in coordination with one another. If the two variables move in the same direction, then those variables are said to have a positive correlation. If they move in opposite directions, then they have a negative correlation.

A correlation is a statistical tool which studies relationship between two variables.And correlation analysis involves different techniques used for studying and measuring extend of relationship between two variables. It will be denoted as r(x,y) or r .

Arithmetic Problem Solving

r=80;
s=10;
Sum=sum(r,s);
Sum;
## [1] 90
A=23;
B=12;
Product=A*B;
Product;
## [1] 276
t=96;
u=33;
v=t/u;
v;
## [1] 2.909091
Column1 Column2
A 23
B 12
Product 276
r 80
s 10
Sum 90
t 96
u 33
vQuotient 2.909090

Types of correlation

X 1 2 3 4
Y 5 7 9 11

Solution: y=2x+3

X increase decrease
Y increase decrease