Question: write INSTRUCTIONS Answer all questions and write all your answers directly on this paper. on this margin B1. A school principal has always believed there

write INSTRUCTIONS Answer all questions and write

write INSTRUCTIONS Answer all questions and write all your answers directly on this paper. on this margin B1. A school principal has always believed there is no difference in the test scores for the 3 different classes of students in the school. With new teachers brought in recently, he wanted to find out if the test scores remain the same, by conducting an ANOVA test. Scores of five (5) students were taken randomly from each class. Class A B 20 25 27 Scores of 5 Randomly Selected Students 20 21 22 26 26 26 28 28 22 27 29 28 Table B1-1 (a) State the null hypothesis and alternate hypothesis. [2 marks] [5 marks] Variance (b) Fill in Table B1-2. Use the next page for your working. Sum of Source of Variation Degree of Squares Freedom Treatments (Due to Different Teachers) Experimental (Due to Error within Brand) Total Table B1-2 (c) Based on the value of F-critical from the F Distribution table, interpret the results of the ANOVA test. Assume a 99% confidence interval. [3 marks]

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