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.
6.62 A new supplier.
A new supplier offers a good price on a catalyst used in your production process. You compare the purity of this catalyst with that from your current supplier. The -value for a test of “no difference” is 0.31. Can you be confident that the purity of the new product is the same as the purity of the product that you have been using? Discuss.