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 savants in an introductory college stinting science class were asked how many credit they had earned in college, and how authorized they were ab forbidden their choice of major. Research challenge: At ? = .01, is the peak of certainty independent of credits earned? attribute bring in Very Uncertain Somewhat accepted 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 between the two factors. Level of logical implication: = 1% termination Rule: Reject the null guessing if p-value therefore, thither is suitable evidence to conclude at 5% direct of signification 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) localisation. Research ques tion: At ? = .05, does vehicle type set forth by mall location? (Data argon 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 speed of light 100 100 400H0: The two factors are independent HA: There is a relationship between the two factors.

Level of meaning: = 5%Decision Rule: Reject the null scheme if p-value Therefore, there is sufficient evidence to conclude at 5% level of significanc e thatthe vehicle type varies by the locatio! n 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. ruction level... If you want to get a full essay, order it on our website: BestEssayCheap.com

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