# which statistical test should I use: 5 schools

I have conducted a study in 5 schools to investigate whether use of a game could improve math performance. In each school there were two classes, one experimental (used the game) and one control (did not use the game). Within each school the classes were assigned to a treatment by chance.

My question is, which statistical test would be best to use here? Thank you Steven

• How to measure the improvement of math performance? pre- and post- game period tests? It tests, score is 0 - 100 or 1-5? Nov 29 '18 at 3:52

$$\tilde{\chi}^2=\frac{1}{d}\sum_{k=1}^{n} \frac{(O_k - E_k)^2}{E_k}$$