what is correlation? do we have to learn it with high calculations? do we have to go for a...
TRANSCRIPT
What is Correlation?
Do we have to learn it with high
calculations?
Do we have to go for a
complicated formula to
understand it?
So, how can we understand
Correlation?
Correlation is easy to
understand if you think about it
logically.
Correlation deals much more with common sense than numbers.
Correlation can be easily
understood as co relation.
Correlation is an average
relationship between two or more variables.
Negative correlation
will be:
When the two variables move in the opposite direction.
When an increase in the value of one variable causes decrease in the value of another variable and vice- versa.
When the two variables move in the opposite direction.
When an increase in the value of one variable causes decrease in the value of another variable and vice- versa.
X Y
2 4
4 7
6 11
9 17
12 25
Y+
Positive Correlation
Positive Correlation
Negative Correlation
Negative Correlation
X Y
30 -2
21 -1
11 3
7 7
-3 12
Y-
Both inputs and outputs
are increasing
Both inputs and outputs
are increasing
Inputs and outputs are
going in opposite
directions
Inputs and outputs are
going in opposite
directions
When the two variables change in
equal proportion and move in the same
direction.
When the two variables change in
equal proportion and move in the same
direction.
When the two variables change in
equal proportion and move in opposite
directions.
When the two variables change in
equal proportion and move in opposite
directions.
No pattern = No correlationNo pattern = No correlation
There is no
relation between income
and height of a person.
There is no
relation between income
and height of a person.
Positive Correlatio
n
Negative Correlatio
n
Perfect positive
Correlation
Perfect Negative
Correlation Zero or No Correlatio
n