For Exercises 6.51 and 6.52, see pages 320–321; for 6.53 to 6.55, see pages 323–324; for 6.56 to 6.59, see pages 325–326; for 6.60 to 6.62, see pages 328–329; for 6.63 and 6.64, see page 331; and for 6.65 and 6.66, see page 332.
6.55 Why is this wrong?
The homebuilders wonder if the national finding applies in the Cleveland area. They have no idea whether Cleveland residents spend more or less than the national average. Because their interviews find that , less than the national 31%, their analyst tests
Explain why this is incorrect.
6.55
You shouldn’t look at the data before deciding the hypotheses; they should be determined based on prior knowledge beforehand.