How do I conduct a step by step chi square analysis on the following questions?
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? Credits EarnedVery UncertainSomewhat CertainVery CertainRow Total 0-9128525 10-59841022 60 or more171119 Column Total21192664 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.) Vehicle TypeSomersetOaklandGreat LakesJamestownRow Total Car44493664193 Minivan2115181367 Full-sized Van233210 SUV1929261286 Truck14617946 Col Total100102100100400 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? Noise LevelClimbCruiseDescentRow Total Low 62614 Medium193830 High131418 Col Total2682861 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 × 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? CorrectRegular COLADiet COLARow Total Yes got it wrong7714 No got it wrong152035 Col Total192746
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go here : http://en.wikipedia.org/wiki/Chi-square_distribution it's well explained
Title : How do I conduct a step by step chi square analysis on the following questions
Description : How do I conduct a step by step chi square analysis on the following questions? 15.18 Sixty-four students in an introductory college econom...