Question

Mathematics 2300 Quia 4 Name 1. H.J. Heinz, Campbell Soup, Kello, Hersey Foods, Quaker Oats, and so on are inmportant food producer. How profitable are such food company Let z be a random varialde that represents annal profit as percentage of assents for the nations largest food companies Assume that a has a distribution that is approximately normal with moan -6.6 (based on information froam Portune 500, Vol 135, No 8) Suppose that recent reports for random selected national food companios gave the following a valuos 6, 6.1,3.3, 2.5,8.4, 6.1, 4.8,3 now less than 6.6 (o) (3 pruinta) State the ull lypotheals and alternative bypathesis (b) (3 points) Find the tost statistic (e) (2 points) If the the significance level is 5%, find the critical value(s) and shade the re ection regiona) d) (2 points) Base on the type-I crror a and rejection region(s), given above, what is your conclusion? (e) (5 points) Find the p-valucs of the test statistic 2. (5 points) A sample of 80 measurements was taken from a population. The sample mean and standard devia were found to be 1060 and 210, respectively. Construct a 95% confidence interval for

Answer 1

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