Statistics & Probability

Problem 8 The weights of salmon grown at a commercial hatchery are normally distributed with a standard deviation of 1.2 pounds. The hatchery claims that the mean weight of this year's crop is 7.6 pounds. Suppose a random smuple of 16 sh yielded an average weight of 7.2 pounds. (a) Is this strong enough evidenee to reject the hatchew's claim at 5 percent signicance level? Use both the test statistic approach and the p-value approach to make your conclusion. (b) How does your answer change in part (a) if you look at 1 peroent signicance level? Explain your