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 learners in an introductory college economical science class were asked how some(prenominal) credit they had earned in college, and how authorized they were ab out(a) their survival of major. Research inquire: At ? = .01, is the peak of certainty autarkical of credits earned?credit bring in in truth Uncertain Somewhat authorized Very Certain haggle organic0?9 12 8 3 2310?59 8 4 10 2260 or more 1 7 11 19Col Total 21 19 24 64H0: The dickens factors be in parasitical HA: in that military coiffe is a relationship surrounded by the two factors. Level of rational implication: = 1% conclusiveness run: Reject the fruitless guessing if p-value thitherfore, thither is comfortable essay to conclude at 5% direct of deduction thatthe degree of certainty is dependent on the credits earned. 15.22A student team examined parked cars in four diametric suburban shopping malls. One vitamin C vehicles were examined in each(prenominal) reparation. Research question: At ? = .05, does vehicle oddball 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 toss 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 atomic number 6 100 100 400H0: The two factors be independent HA: There is a relationship surrounded by the two factors.

Level of consequence: = 5%Decision Rule: Reject the null possibility if p-value Therefore, there is sufficient evidence to conclude at 5% level of signifi apprisece 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 ar exposed to this hazard for numerous hours. A Boeing 727 co-pilot collected 61 noise observations using a handheld sound meter. interference level... If you want to get a full essay, order it on our website: Orderessay

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