THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION

Essay

THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:
An instructor in an economics class is considering three different texts.She is also considering three types of examinations-multiple choice,essays,and a mix of multiple choice and essays.During the year she teaches nine sections of the course and randomly assigns a text - examination type combination of each section.At the end of the course she obtained students' evaluations for each section.These ratings are shown in the accompanying table.

-Test the null hypothesis of equality of population mean ratings for the three examination types.Use α = 0.05.