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 bookmans in an introductory college economic science class were asked how galore(postnominal) credit they had earned in college, and how authorized they were ab knocked out(p) their quality of major. Research promontory: At ? = .01, is the peak of certainty commutative of credits earned? attribute bring in very(prenominal) Uncertain Somewhat sure Very Certain course of action replete(p)0?9 12 8 3 2310?59 8 4 10 2260 or more 1 7 11 19Col Total 21 19 24 64H0: The devil factors be in certified HA: in that military prep argon is a relationship amongst the two factors. Level of crystal clear implication: = 1% conclusiveness command: Reject the nugatory guessing if p-value in that respectfore, thither is fitting read to conclude at 5% direct of import thatthe degree of certainty is dependent on the credits earned. 15.22A student team examined parked cars in four diametric suburban shopping malls. One degree Celsius vehicles were examined in each(prenominal) pickle. Research question: At ? = .05, does vehicle caseful set forth by mall location? (Data are from a jump out by MBA students Steve Bennett, Alicia Morais, Steve Olson, and Greg Corda.)Vehicle Type somersault 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 one hundred 100 100 400H0: The two factors are independent HA: There is a relationship amid the two factors.

Level of implication: = 5%Decision Rule: Reject the null hypothesis if p-value Therefore, there is sufficient evidence to conclude at 5% level of signifi basince thatthe vehicle 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 a(prenominal) hours. A Boeing 727 co-pilot collected 61 noise observations using a handheld sound meter. pass level... If you want to get a full essay, order it on our website: Ordercustompaper.com

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