# Question: An instructor has a class of 23 students At the

An instructor has a class of 23 students. At the beginning of the semester, each student is randomly assigned to one of four teaching assistants—Smiley, Haydon, Alleline, or Bland. The students are encouraged to meet with their assigned teaching assistant to discuss difficult course material. At the end of the semester, a common examination is administered. The scores obtained by students working with these teaching assistants are shown in the accompanying table.

a. Calculate the within-groups, between-groups, and total sum of squares.

b. Complete the analysis of variance table, and test the null hypothesis that the population mean sales levels are the same for all three box colors.

a. Calculate the within-groups, between-groups, and total sum of squares.

b. Complete the analysis of variance table, and test the null hypothesis that the population mean sales levels are the same for all three box colors.

## Answer to relevant Questions

Refer to Exercise 15.33. Suppose that a second store for each region-can color combination is added to the study, yielding the results shown in the following table. Combining these results with those of Exercise 15.33, carry ...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 ...A study was aimed at assessing the class-schedule satisfaction levels, on a scale of 1 (very dissatisfied) to 7 (very satisfied), of nontenured faculty who were job-sharers, full time, or part-time. For a sample of 25 ...Consider the two-way analysis of variance setup, with µ observations 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 ...a. Show that the centered s-point moving average series of Section 16.2 can be written as follows: b. Show that Discuss the computational advantages of this formula in the seasonal adjustment of monthly time series.Post your question