... forms.Performance results on psychological measures, entertainment for students in Phu Van clinics center after 3 years of implementation were very encouraging, including measures psychological, ... peopleIndividual psychological therapy 320 318 345Comunity art contest 3 250 4 320 4 325Newspaper contest 2 3 3Watch movie 10 16,200 12 18,400 12 18,600Watch TV In the evening everyday3.2.2. Effect ... preceding the survey. Estimated p = 0.5.+ DE: Effective design, by design random sample many levels, so pick DE = 1.8.As the formula above we get n = 2,766. Practice has surveyed 2,800 people.2.2.4....