24. Based on the sample evidence in Exhibits 12.42 and 12.43 in Exercises 21 and 23, is there evidence of a difference in the proportions of peanuts in the mixed-nuts packages of the two companies? Use α = 5%.
Answer to relevant QuestionsConstruct a 90% confidence interval estimate of the difference in proportion of peanuts in the mixed-nuts packages described in the previous exercises. Do you expect this confidence interval to contain zero? Why or why not? Re-do Exercise 6 above as a Chi-square test. Did you get the same answer? Did you expect to? In exercise A random sample of new members of a large downtown fitness club was selected, and tracked over six months. Of the 60 ...If appropriate, test to see whether there is evidence of a negative relationship between semester average marks and hours spent working. Use α = 0.05. If appropriate, create a 99% prediction interval for the total revenue of a global research company with 10,000 employees. A statistics professor wants to know whether a student's mark on the second statistics test is a good indicator of the student's mark on the final exam. She records the two marks for a random sample of students. Create a ...
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