What Are Our Variables?

We have 2 important variables which are Independent and Dependent variables, and also 1 Extraneous variable. Our independent variable is exercise, and the dependent variable is blood pressure. The extraneous variable is diet, weight, genes, psychological factors, environment, physical position etc.

It is important to minimize the extraneous variables. This is to reduce the number of errors in our experiment and get more accurate results.

To minimize variables,
- Use the same blood pressure set

- Ask samples to relax before blood pressure taking takes place

- Refrain them from talking

- Position them in the same position

- Get samples from a particular age group

We control the variables that we can control.