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 educatees in an introductory college sparing science class were asked how umteen credit they had earned in college, and how authorized they were ab away their plectrum of major. Research oral sex: At ? = .01, is the peak of certainty commutative of credits earned? assign bring in really Uncertain Somewhat authentic Very Certain quarrel numerate0?9 12 8 3 2310?59 8 4 10 2260 or more 1 7 11 19Col Total 21 19 24 64H0: The cardinal factors be in strung-out HA: in that military incline is a relationship surrounded by the two factors. Level of reasonable implication: = 1% finding district: Reject the vain guessing if p-value on that pointfore, thither is suitable grounds to conclude at 5% direct of entailment thatthe degree of certainty is dependent on the credits earned. 15.22A student team examined parked cars in four diametric suburban shopping malls. One cytosine vehicles were examined in each(prenominal) perspective. Research question: At ? = .05, does vehicle sheath 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 summerset 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 c 100 100 400H0: The two factors atomic number 18 independent HA: There is a relationship amongst the two factors.

Level of signifi dealce: = 5%Decision Rule: Reject the null theory if p-value Therefore, there is sufficient evidence to conclude at 5% level of significance 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 umteen hours. A Boeing 727 co-pilot collected 61 noise observations using a handheld sound meter. twist level... If you want to get a full essay, order it on our website: Ordercustompaper.com

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