Applied Statistics and Probability for Engineers 6th Edition solutions

Applied Statistics and Probability for Engineers 6
Consider the following computer output. Test and CI for Two Proportions (a) Is this a one-sided or a two-sided test? (b) Fill in the missing values. (c) Can the null hypothesis be rejected? (d) Construct an approximate 90% CI for the difference in the two proportions.

Applied Statistics and Probability for Engineers 6
Consider the following computer output. Test and CI for Two Proportions Sample X N Sample p 1 188 250 0.752000 2 245 350 0.700000 Difference \(=\mathrm{p}\ (1)-\mathrm{p}\ (2)\) Estimate for difference: 95% lower bound for difference: ? Test for difference \(=0\ (\mathrm {vs}>0)\ :\

Applied Statistics and Probability for Engineers 6
An article in Knee Surgery, Sports Traumatology, Arthroscopy (2005, Vol. 13, pp. 273279) considered arthroscopic meniscal repair with an absorbable screw. Results showed that for tears greater than 25 millimeters, 14 of 18 (78%) repairs were successful, but for shorter tears, 22 of 30 (73%) repairs w

Applied Statistics and Probability for Engineers 6
In the 2004 presidential election, exit polls from the critical state of Ohio provided the following results: For respondents with college degrees, 53% voted for Bush and 46% voted for Kerry. There were 2020 respondents. (a) Is there a significant difference in these proportions? Use \(\alpha=0.05\).

Applied Statistics and Probability for Engineers 6
Problem 86E Two different types of injection-molding machines are used to form plastic parts. A part is considered defective if it has excessive shrinkage or is discolored. Two random samples, each of size 300, are selected, and 15 defective parts are found in the sample from machine 1, and 8 defec

Applied Statistics and Probability for Engineers 6
Problem 87E Two different types of polishing solutions are being evaluated for possible use in a tumble-polish operation for manufacturing interocular lenses used in the human eye following cataract surgery. Three hundred lenses were tumble polished using the first polishing solution, and of this n

Applied Statistics and Probability for Engineers 6
Problem 88E A random sample of 500 adult residents of Maricopa County indicated that 385 were in favor of increasing the highway speed limit to 75 mph, and another sample of 400 adult residents of Pima County indicated that 267 were in favor of the increased speed limit. (a) Do these data indicate

Applied Statistics and Probability for Engineers 6
Air pollution has been linked to lower birthweight in babies. In a study reported in the Journal of the American Medical Association, researchers examined the proportion of low-weight babies born to mothers exposed to heavy doses of soot and ash during the World Trade Center attack of September 11, 2

Applied Statistics and Probability for Engineers 6
Problem 90E The New England Journal of Medicine reported an experiment to judge the efficacy of surgery on men diagnosed with prostate cancer. The randomly assigned half of 695 (347) men in the study had surgery, and 18 of them eventually died of prostate cancer compared with 31 of the 348 who did

Applied Statistics and Probability for Engineers 6
Rework the election data reported in Exercise 10-85 using the alternate CI procedure described in this section. Compare the lengths of the CI from Exercise 10-85 with this one. Discuss the possible causes of any differences that you observe.

Applied Statistics and Probability for Engineers 6
Consider the highway speed limit data introduced in Exercise 10-88. Find a 99% CI on the difference in the two proportions using the alternate CI procedure described in this section. Compare the lengths of the CI from Exercise 10-88 with these in this one. Discuss the possible causes of any differenc