Detailed ppt on correlation and its types

1. TOPIC : INTRODUCTION OF
CORRELATION
PRESENTED BY: MEHARLEEN KAUR
PUPIL-TEACHER ROLL NO. : 26

2. MEANING OF
CORRELATION
Correlation means to find out the
relationship between two or more variables.
Examples:
Price and Demand,
Height and Weight,
Temperature and Demand for soft drinks

3. TYPES OF
CORRELATION :
1. POSITIVE CORRELATION
2.NEGATIVE CORRELATION
3.SIMPLE CORRELATION
4.PARTIAL CORRELATION
5.MULTIPLE CORRELATION
6.TOTAL CORRELATION
7.LINEAR CORRELATION
8.NON LINEAR CORRELATION

4. POSITIVE CORRELATION
• A positive correlation
exists when one variable
decreases as the other
variable decreases, or one
variable increases while
the other increases
• A positive correlation is a
relationship between two
variables that tend to
move in the same
direction.
• Example : Salary and
Expenditure

5. NEGATIVE CORRELATION
• Negative correlation is a
relationship between two
variables in which one
variable increases as the
other decreases, and vice
versa.
• Negative correlation
describes when two
variables tend to move in
opposite direction.
• Example : Price of an
article and its Demand

6. SIMPLE CORRELATION
• When we study the association
between two variables it is called
Simple Correlation .

7. • PARTIAL CORRELATION
When we study the association
between two variables only while
there are given more than two
variables .
Example :
Given variables x,y,z
We take only x & y ignoring z OR
We take only y & z ignoring x OR
We take only x & z ignoring y OR
• MULTIPLE
CORRELATION
When we are given more than
two variables and we study
association between one variable
and other variables together .
Example :
Given variables x,y,z
We study association between
X & Y together
Or Y & Z together

8. LINEAR CORRELATION &
NON-LINEAR CORRELATION
• Correlation is said to be linear if
the ratio of change is constant
between the two variables .
• Example :
When the amount of output in
a factory is doubled by doubling
the number of workers, this is
an example of linear
correlation.
• Correlation is said to be non-
linear if the ratio of change is
not constant between the two
variables .

9. Thankyou