Chi-Square Homework

13.11 T RIX ARE FOR K IDS Trix cereal comes in five fruit flavors, and each flavor has a different shape. A curious student methodically sorted an entire box of cereal and found the following distribution of flavors for the pieces of cereal in the box: Test the null hypothesis that the flavors are uniformly distributed versus the alternative that they are not. FlavorGrapeLemonLimeOrangeStrawberry Frequency

13.20 S MOKING BY S TUDENTS AND T HEIR P ARENTS How are the smoking habits of students related to their parents’ smoking? Here are data from a survey of students in eight Arizona high schools: Student Smokes Student does not Smoke Both Parents Smoke One Parent Smokes Neither Parent Smokes

Cars (not from our book) A random survey of autos parked in the student lot and the staff lot at a large university classified the brands by country of origin, as seen in the table. Are there differences in the national origins of cars driven by students and staff? StudentStaff American European 3312 Asian 5547