Class Discussion 2000 Final Exam Weights of fish caught by a trawler over the past few years have been approximately normal, with a mean of 4.5 lb and a standard deviation of 0.5 1b. I can tell you for free that the mean A Fisheries and Oceans researcher thinks that foreign and SD of this trawlers have been illegally overfishing the stock so that sample are 3.991 fish are no longer as big as previously. A sample of 8 and 0.6779 1b. On randomly chosen fish are weighed: an exam be sure to 4.17 3.36 4.81 3.89 4.80 4.38 2.92 3.60 use the formula (a) Given this sample of fish, should the Fisheries for the sample SD researcher conclude that fish now being caught are with n-1 in it, not smaller? the population SD (b) If the Fisheries researcher does NOT have a historical formula with N. value for the standard deviation of fish weights, should he/she conclude that fish now being caught are smaller