A study was conducted with four sections of CQMS210 and 33 students in each section. The students are randomly assigned to the sections. A common test were administered in the 4 sections and the test scores were collected. At 6% level of significance,is there evidence of a significant mean difference in the test scores among the four sections of CQMS210?

Answer the following questions:

a) What is the null hypothesis?

b) What is/are the critical value(s) if level of significance is 0.06?

(Rounded to 4 decimal points)