Week 5

E-Text Christopher Shaw RES341 1. A random sample of 10 miniature Tootsie Rolls was interpret from a bag. Each piece was weighed on a genuinely holy 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 part sanction interval for the accredited mean 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 surface would be necessary to estimate the true weight with an fault 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 round up: n = 53 (c) Q: hash out the factors which might cause fluctuation in the weight of Tootsie Rolls during manufacture. (Data ar from a project by MBA student Henry Scusse l.) Tootsie (c) A: Precision of the tally of ingredients in the mix, humidity and temperature control, etc.   conformity of batches; machine tolerances utilise during confect manufacture, boundary of cutting tools utilized to form pieces. Precision of the amount of ingredients in the mix, humidity and temperature control, etc.

 consistency of batches; machine tolerances utilized during glaze over manufacture, sharpness of cutting tools utilized to form pieces. 2. 8.63 The State of international nautical mile tested 766 water samples from private wells in Lapeer County, Michigan, and prepare that 112 exceeded the EPA guidelines of 50 ppb. (a) identify the quantity error of the estimated proportion. (b) hap the 95 p! ercent confidence interval width for the true proportion. (c) Is newton an issue here? Explain. (d) Try the Very firm Rule. Does it fail well here? Explain. (Data are from Detroit Free Press, November 27, 1997, p. 8A.) a.) Find the standard error of the estimated proportion. p = 112/766 q = 1 - 112/766 N...If you want to snuff it a full essay, order it on our website: OrderEssay.net

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