Chapter 11.1, Problem 10E

For Exercises 5 through 18, perform these steps.

a. State the hypotheses and identify the claim.

b. Find the critical value.

c. Compute the test value.

d. Make the decision.

e. Summarize the results.

10 Truck Colors In a recent year, the most popular colors for light trucks were white, 31%; black, 19%; silver 11%; red 11%; gray 10%; blue 8%; and other 10%. A survey of randomly selected light truck owners in a particular area revealed the following. At α = 0.05, do the proportions differ from those stated?

Source: World Almanac.