Problem

Tuna, continued Refer to Exercise 13.32. The hypothesis tested in Chapter 11—that th...

Tuna, continued Refer to Exercise 13.32. The hypothesis tested in Chapter 11—that the average prices for the four types of tuna are the same—is equivalent to saying that E(y) will not change as x1 and . Use the MINITAB printout for the one-way ANOVA shown below to perform the test for equality of treatment means. Verify that this test is identical to the test for significant regression in Exercise 13.32.

Reference:

Tuna Fish The tuna fish data from Exercise 11.16 were analyzed as a completely randomized design with four treatments. However, we could also view the experimental design as a 2 2 factorial experiment with unequal replications. The data are shown below.

The data can be analyzed using the model

a. Show how you would enter the data into a computer spreadsheet, entering the data into columns for

b. The printout generated by MINITAB is shown below. What is the least-squares prediction equation?

c. Is there an interaction between type of tuna and type of packing liquid?

d. Which, if any, of the main effects (type of tuna and type of packing liquid) contribute significant information for the prediction of y?

e. How well does the model fit the data? Explain.