Chapter 8, Problem 8.3.8RE

For Exercises 1 through 20, perform each of the following steps.

a. State the hypotheses and identify the claim.

b. Find the critical value(s).

c. Compute the test value.

d. Make the decision.

e. Summarize the results.

Use the traditional method of hypothesis testing unless otherwise specified.

8. Whooping Crane Eggs Once down to about 15, the world’s only wild flock of whooping cranes now numbers a record 237 birds in its Texas Coastal Bend wintering ground (www.SunHerald.com). The average whooping crane egg weighs 208 grams. A new batch of randomly selected eggs was recently weighed, and their weights are listed. At α = 0.01, is there sufficient evidence to conclude that the weight is greater than 208 grams? Assume the variable is normally distributed.