CORRELATION
AND
REGRESSION
T.Gayathri
Senior Lecturer in Statistics
Department of Community Medicine
SRMC
1
,Outline
Types of correlation
Methods of correlation
Simple linear regression
2
,Introduction
How do we measure the relationship or an association between
two variables?
Continuous variables - correlation and regression
(Height, Weight, Blood pressure)
Categorical variables - Odds Ratio (OR)
–Relative Risk (RR)
(Status of disease, gender)
3
, Correlation
“correlation” indicates…
strength of the relationship
( strong, weak, no relationship)
direction of the relationship
(positive, negative)
4
AND
REGRESSION
T.Gayathri
Senior Lecturer in Statistics
Department of Community Medicine
SRMC
1
,Outline
Types of correlation
Methods of correlation
Simple linear regression
2
,Introduction
How do we measure the relationship or an association between
two variables?
Continuous variables - correlation and regression
(Height, Weight, Blood pressure)
Categorical variables - Odds Ratio (OR)
–Relative Risk (RR)
(Status of disease, gender)
3
, Correlation
“correlation” indicates…
strength of the relationship
( strong, weak, no relationship)
direction of the relationship
(positive, negative)
4
