(Solution) 18 - Sixty-four Students In An Introductory College Economics Class Were Asked How Many Credits They Had Earned In College, And How Certain They Were... | Snapessays.com

(Solution) 18 - Sixty-four students in an introductory college economics class were asked how many credits they had earned in college, and how certain they were...

15.18 - Sixty-four students in an introductory college economics class were asked how many credits they had earned in college, and how certain they were about their choice of major. Research question: At α = .01, is the degree of certainty independent of credits earned? Certainty


Credits Earned Very Uncertain Somewhat Certain Very Certain Row Total


0-9 12 8 3 23


10-59 8 4 10 22


60 or more 1 7 11 19


Col Total 21 19 24 64


15.22 - A student team examined parked cars in four different suburban shopping malls. One hundred vehicles were examined in each location. Research question: At α = .05, does vehicle type vary by mall location? (Data are from a project by MBA students Steve Bennett, Alicia Morais, Steve Olson, and Greg Corda.) Vehicles


Vehicle Type Somerset Oakland Great Lakes Jamestown Row Total


Car 44 49 36 64 193


Minivan 21 15 18 13 67


Full-sized Van 2 3 3 2 10


SUV 19 27 26 12 84


Truck 14 6 17 9 46


Col Total 100 100 100 100 400


15.24 - High 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. Noise level is defined as "Low" (under 88 decibels), "Medium" (88 to 91 decibels), or "High" (92 decibels or more). There are three flight phases (Climb, Cruise, Descent). Research question: At α = .05, is the cockpit noise level independent of flight phase? (Data are from Capt. Robert E. Hartl, retired.) Noise


Noise Level Climb Cruise Descent Row Total


Low 6 2 6 14


Medium 18 3 8 29


High 1 3 14 18


Col Total 25 8 28 61


15.28 - Can people really identify their favorite brand of cola? Volunteers tasted Coca-Cola Classic, Pepsi, Diet Coke, and Diet Pepsi, with the results shown below. Research question: At α = .05, is the correctness of the prediction different for the two types of cola drinkers? Could you identify your favorite brand in this kind of test? Since it is a 2 Ã- 2 table, try also a two-tailed two-sample z test for π1 = π2 (see Chapter 10) and verify that z2 is the same as your chi-square statistic.Which test do you prefer? Why? (Data are from Consumer Reports 56, no. 8 [August 1991], p. 519.) Cola


Correct? Regular Cola Diet Cola Row Total


Yes, got it right 7 7 14


No, got it wrong 12 20 32


Col Total 19 27 46


Solution details:

This question was answered on: May 23, 2022

Solution~00021147602944.zip (25.37 KB)

This attachment is locked

Our expert Writers have done this assignment before, you can reorder for a fresh, original and plagiarism-free copy and it will be redone much faster (Deadline assured. Flexible pricing. TurnItIn Report provided)

Pay using PayPal (No PayPal account Required) or your credit card . All your purchases are securely protected by .

About this Question






May 23, 2022





We have top-notch tutors who can do your essay/homework for you at a reasonable cost and then you can simply use that essay as a template to build your own arguments.

You can also use these solutions:

  • ■ As a reference for in-depth understanding of the subject.
  • ■ As a source of ideas / reasoning for your own research (if properly referenced)
  • ■ For editing and paraphrasing.

This we believe is a better way of understanding a problem and makes use of the efficiency of time of the student.

Get Free Price Quote