Week 5

E-Text Christopher Shaw RES341 1. A random test of 10 miniature Tootsie Rolls was taken from a bag. Each moment was weighed on a very sanctum scale. The results in grams were 3.087 3.131 3.241 3.241 3.270 3.353 3.400 3.411 3.437 3.477 (a) Construct a 90 percent instigate breakup for the dependable cogitate weight. E = z*sigma/sqrt(n) E = 1.645*0.13199/sqrt(10) E = 0.06866 -------------- x-bar = 3.3048 ----------------- 90% CI = (3.3048-0.06866 , 3.3048+0.06866) -------------------------------------- (b) What sample size would be necessary to estimate the true weight with an error of } 0.03 grams with 90 percent confidence? E = z*sigma/sqrt(n) n = [z*sigma/E]^2 z* for 90% confidence = 1.645 sigma = 0.13199 E = 0.03 ------------ n = [1.645*0.13199/0.03]^2 = 52.38 roofy up: n = 53 (c) Q: plow the factors which might cause variance in the weight of Tootsie Rolls during manufacture. (Data are from a project by MBA student Henry Scussel.) Tootsie (c) A: Precision of the tally of ingredients in the mix, humidity and temperature control, etc.   conformity of batches; machine tolerances use during candy manufacture, sharpness of trimming tools utilized to form pieces. Precision of the metre of ingredients in the mix, humidity and temperature control, etc.

  physical structure of batches; machine tolerances utilized during glass in over manufacture, sharpness of cutting tools utilized to form pieces. 2. 8.63 The show of international nautical myocardial infarct tested 766 water samples from esoteric wells in Lapeer County, Michigan, and take that 112 exceeded the EPA guidelines of 50 ppb. (a) Find the criterion error of the estimated proportion. (b) Find the 95 percent confidence interval width for the true proportion. (c) Is atomic number 7 an issue here? Explain. (d) exploit the Very Quick Rule. Does it let on well here? Explain. (Data are from Detroit Free Press, November 27, 1997, p. 8A.) a.) Find the ensample error of the estimated proportion. p = 112/766 q = 1 - 112/766 N...If you want to get a full essay, order it on our website: Orderessay

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