Comstock Manufacturing uses a metal laminating process in its production of lightweight panels used in building commercial jets. The company is considering replacing its primary laminating adhesive with one of two possible new adhesives and will run tests of laminate strength (in pounds) for each of the two possible replacements. Sample results will be used in a hypothesis test testing H0: π Mean strength of Adhesive A laminated panels is no greater than mean strength of Adhesive B laminated panels. Ha: π Mean strength of Adhesive A laminated panels is greater than mean strength of Adhesive B laminated panels. Design the hypothesis test using a significance level of 1%. For the test, you want the probability of failing to reject the null hypothesis to be no more than 5% if the (population) average laminate strength for Adhesive A is actually 50 pounds greater than the (population) average laminate strength for Adhesive B. Report the sample size (number of panels) for your test and explain exactly how the test would work. (Assume that in a preliminary sample of laminated panels, the Adhesive A laminates had a standard deviation of 90 pounds and the Adhesive B laminates had a standard deviation of 85 pounds.)
Answer to relevant QuestionsTilton Athletic Gear is planning to conduct surveys in Los Angeles and New York in an effort to determine whether consumer awareness of the Tilton Athletic brand differs among consumers in these two major markets. Sample ...It has been argued that a shopper can have too many choices when considering a major purchase, leading to increased shopping anxiety. (See, for example, The Paradox of Choice Why More Is Less by Barry Schwartz.) In a study ...Refer to Exercise 9 (customer wait time), where the least squares line is yˆ = 126 1.8x. a. Report the SSE and s y. x values. b. Tell what these measures represent Compute and interpret the r2 and r values for the regression analysis described in Exercise 6 (Amazon sales). (To speed your calculations: SST 320 and SSR 160.) Refer to Exercise 3 where we are trying to link mortgage interest rate (x) to home sales (y). The estimated regression equation there was ˆy =90 – 4x. a. Show the 90% confidence interval estimate of the “population” ...
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