Page 2 - Home assignment-correlation analysis.
P. 2
EX: - a. = ( )
b. = ( ) where
′ ′ ′ ′ .
c. = ( ) where
′ ′ ′ ′ .
The above examples come under simple correlation as we
deal with only two variables.
The correlation is said to be Multiple when the degree of
relationship between three or more variables are studied
simultaneously.
. = ( , )
Here we study the relationship between 3 variables x, y & z.
ii. = , , , where
′
′
.
.
When the degree of relationship between more than two
variables are studied out of many variables, assuming the role of
others as silent or neutral we call it partial correlation.
= , where
.
In the above example it is observed that only the relationship
between three variables , are studied and
are assumed to be silent or neutral as per
example-2 above is called partial correlation.
2. Positive and negative correlation: -
