# Question: An instructor in an economics class is considering three different

An instructor in an economics class is considering three different texts. He is also considering three types of examinations-multiple choice, essay, and a mix of multiple choice and essay questions. During the year he teaches nine sections of the course and randomly assigns a text-examination type combination of each section. At the end of the course he obtained students' evaluations for each section. These ratings are shown in the accompanying table.

a. Prepare the analysis of variance table.

b. Test the null hypothesis of equality of population mean ratings for the three texts.

c. Test the null hypothesis of equality of population mean ratings for the three examination types.

a. Prepare the analysis of variance table.

b. Test the null hypothesis of equality of population mean ratings for the three texts.

c. Test the null hypothesis of equality of population mean ratings for the three examination types.

## Relevant Questions

Four real estate agents were asked to appraise the values of 10 houses in a particular neighborhood. The appraisals were expressed in thousands of dollars, with the results shown in the following table. Source of Variation ...Consider an experiment with treatment factors A and B, with factor A having four levels and factor B having three levels. The results of the experiment are summarized in the following analysis of variance table. Compute the ...In some experiments with several observations per cell the analyst is prepared to assume that there is no interaction between groups and blocks. Any apparent interaction found is then attributed to random error. When such an ...In an experiment designed to assess aids to the success of interviews of graduate students carried out by faculty mentors, interviewers were randomly assigned to one of three interview modes-feedback, feedback and goal ...Consider the two-way analysis of variance setup, with one observation per cell. a. Show that the between-groups sum of squares can be written as follows: b. Show that the between-blocks sum of squares can be written as ...Post your question