Question: a. A random sample of 30 people was asked to rate each of four different premium brands of coffee. The ratings are: Excellent Good Fair

a. A random sample of 30 people was asked to rate each of four different premium brands of coffee. The ratings are:

Excellent

Good

Fair

Poor

The responses were assigned numbers 1 through 4, respectively. Can we infer that differences exist between the ratings of the four brands of coffee?

b. Suppose that the codes were 12, 31, 66, and 72, respectively. Can we infer that differences exist between the ratings of the four brands of coffee?

c. Compare your answers in Parts (a) and (b). Why are they identical?

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