1. A school has three different teams of students (Red team, Blue team, and Green Team). They want to test if the average hours of weekly homework is equal between the three teams. They collect a random sample of students and find out how many hours of homework they have in an average week. The hours of homework is has a normal distribution. What is the correct test for the school to run? a. indepedent sample t test b. paired samples t test c. Wilcoxon signed rank test d. anova with a post hoc test

2. A teacher has changed their teaching style for this year and wants to test if their students grades are significantly different this year compared to their student's grades last year. The students are different people. Assuming the grades are symmetrically distributed and scored between a 0% and a 100%, what is the correct test for the teacher to run?

a. mann-whitney u test b. Paired samples t test c. pearson's correlation d. independent samples t test

3. A school has 52 teachers who have been teaching last year and this year. The summer between the two years they had a training for all the teachers to be more effective in their teaching. The school wants to test if the teachers scored significantly better this year on their course evaluations compared to last year. What is the best test for them to run? The evaluations scores are scored between 0 and 100 and are normally distributed.

a. Pearson's correlation

b. Wilcoxon signed-rank test

c. anova with a post hoc test

d. paired samples t test