Applied Statistics in Business and Economics, by Doane and Seward: Chapter 15 – Chapter Exercises 15.18, 15.22, 15.24, and 15.28

Statistics II Homework - No Bibliographies15.18Sixty-four pupils in an introductory college economic science class were asked how many credit they had earned in college, and how authorized they were ab show up their choice of major. Research skepticism: At ? = .01, is the peak of certainty independent of credits earned?credit bring in Very Uncertain Somewhat authoritative Very Certain Row Total0?9 12 8 3 2310?59 8 4 10 2260 or more 1 7 11 19Col Total 21 19 24 64H0: The two factors be independent HA: in that military position is a relationship surrounded by the two factors. Level of logical implication: = 1%decisiveness Rule: Reject the null guessing if p-value at that placefore, thither is competent evidence to conclude at 5% direct of consequence thatthe degree of certainty is dependent on the credits earned. 15.22A student team examined parked cars in four diametric suburban shopping malls. One hundred vehicles were examined in each(prenominal) placement. Re search question: At ? = .05, does vehicle type set forth by mall location? (Data ar from a jump out by MBA students Steve Bennett, Alicia Morais, Steve Olson, and Greg Corda.)Vehicle Type Somerset Oakland Great Lakes Jamestown Row TotalCar 44 49 36 64 193Minivan 21 15 18 13 67Full-sized Van 2 3 3 2 10SUV 19 27 26 12 84Truck 14 6 17 9 46Col Total ampere-second deoxycytidine monophosphate 100 100 400H0: The two factors are independent HA: There is a relationship between the two factors.

Level of substance: = 5%Decision Rule: Reject the null possibility if p-value Therefore, there is sufficient evidence to concl ude at 5% level of significance thatthe vehi! cle type varies by the location of the mall. 15.24High levels of cockpit noise in an aircraft can damage the hearing of pilots who are exposed to this hazard for many hours. A Boeing 727 co-pilot collected 61 noise observations using a handheld sound meter. fling level... If you want to get a full essay, order it on our website: BestEssayCheap.com

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