In a comparative study of the examination score of 4 women that have different difficulty or not.By experimenting with 5 students, who each must make all the series 4 examination results.Test
In a study comparing the test scores of the four series that have different or no difficulty. The students were tested on five people who each have their test results, it has the 4 series. Test
In the comparative study of the 4 score test set that has a different difficulty or by ทำการทดสอบ with students 5 people. Each person must do both 4 series, the effect of test.