WORE SEATBELT? INJURED OR KILLED? Yes No Total No 3,865 27,037 30,902 Yes 2,409 35,383 37,792 Total 6,274 62,420 68,694 Source: Cook (in Agresti and Finlay 2009) 5) Describe the strength of the association between seatbelt use and injury/death using the odds ratio. Calculate the odds ratio and interpret the result.
Correlation
Correlation defines a relationship between two independent variables. It tells the degree to which variables move in relation to each other. When two sets of data are related to each other, there is a correlation between them.
Linear Correlation
A correlation is used to determine the relationships between numerical and categorical variables. In other words, it is an indicator of how things are connected to one another. The correlation analysis is the study of how variables are related.
Regression Analysis
Regression analysis is a statistical method in which it estimates the relationship between a dependent variable and one or more independent variable. In simple terms dependent variable is called as outcome variable and independent variable is called as predictors. Regression analysis is one of the methods to find the trends in data. The independent variable used in Regression analysis is named Predictor variable. It offers data of an associated dependent variable regarding a particular outcome.
|
WORE SEATBELT? |
INJURED OR KILLED? |
||
|
Yes |
No |
Total |
|
|
No |
3,865 |
27,037 |
30,902 |
|
Yes |
2,409 |
35,383 |
37,792 |
|
Total |
6,274 |
62,420 |
68,694 |
Source: Cook (in Agresti and Finlay 2009)
5) Describe the strength of the association between seatbelt use and injury/death using the odds ratio. Calculate the odds ratio and interpret the result.
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