Fishing: Atlantic Salmon Homser Lake, Oregon, has an

Chapter , Problem 19

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Fishing: Atlantic Salmon Homser Lake, Oregon, has an Atlantic salmon catch and release program that has been very successful. The average fishermans catch has been m 8.8 Atlantic salmon per day. (Source: National Symposium on Catch and Release Fishing, Humboldt State University.) Suppose that a new x x a 0.01. x 15.1 s 2.51. a 0.05. x 4.40 s 0.28. 428 Chapter 9 HYPOTHESIS TESTING quota system restricting the number of fishermen has been put into effect this season. A random sample of fishermen gave the following catches per day: 12 6 11 12 5 0 2 7 8 7 6 3 12 12 i. Use a calculator with mean and sample standard deviation keys to verify that 7.36 and s 4.03. ii. Assuming the catch per day has an approximately normal distribution, use a 5% level of significance to test the claim that the population average catch per day is now different from 8.8.