I want to test whether three different groups of people who

I want to test whether three different groups of people who are given different treatments for statistics related PTSD have different rates of improvement in symptoms, which are measured as a continuous variable. What test should I use and why?

Solution

I want to test whether three different groups of people who are given different treatments for statistics related PTSD have different rates of improvement in symptoms, which are measured as a continuous variable. What test should I use and why?

There are three different groups.

The vaiable measured as a continuous variable.

Our aim is to compare means of the thre groups.

We have to apply one way ANOVA to this problem.

ANOVA is used to compare more than 2 group means when the measurement is in interval or ratio scale.