Need help on the odd numbers Need help on the odd numbers the Departments of Psy

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Need help on the odd numbers Need help on the odd numbers the Departments of Psychology at the University of Arl University of Texas at Austin. 7. Word Counts Data Set 17 in App 8. Chocolate An artice in Journal of Nutrition (Vol. 130, No. 8) noted that chocolat reduce the risk of coronary heart disease." The study received fundinmMars, 17 in flavonoids. The article notes that "regular consumption of foods rnv candy company, and the Chocolate Manufacturers Association Sampling Method. In Exvercises 9-12, determine whether the sampling method pears to be sound or is flawed. be ap- nal informatin 9. Wi-Fi Security A surve e providing of person when using Wi-Fi hotspots. The survey subjects were Internet users who respondedto au tion that was posted on the electronic edition o f USA Today 10. Text Messaging In a survey of 109 subjects, each was asked to indicate how many to messages they send and receive each day. The sample consisted of those who chose to respon to the request posted on the StatCrunch Web site. 11. Applying for a Job In a survey of 514 human resource professionals, each was asked about the importance of the appearance of a job applicant. The survey subjects were ran- domly selected by Harris Interactive pollsters. 12. Evolution In a survey of beliefs about evolution, Gallup pollsters randomly selected ad telephoned 1018 adults in the United States. Statistical Significance and Practical Significance. In Exercises 13-16, determine wbetber the results appear to have statistical significance, and also determine whether be results have practical siguificance. 13. Waite Diet In a study of the Marisa Waite diet, four subjects lost an average of pounds. It is found that there is about a 30% chance of getting such results with a diet has no effect 14. Gender Selection In a study of the Gender Aide method of gender selection, 1000 d ers of the method gave birth to 540 boys and 460 girls. There is about a 19% chance that suxcb extreme results would oecur if the method had no effect. 15. Guessing Technique When making random guesses for difficult multiple-cho questions with possible answers of a, b, c, d, and e, we expect to get about 20% answers correct. The Ashton Prep Program claims to have better met of guessing. In a test of that program, guesses were made for 100 answers, and 23 w found to be correct. There is a 23% chance of getting such results if the program effect. oice test developed a

Explanation / Answer

Answer:

Sampling method (Exercise 9-12)

9) Wifi security:

10) Tex Messaging:

11) Applying for a job:

12) Evolution:

Statistical significance and practical significance

13) A 30% chance of getting such results with a diet that has no effect indicates that it is not a statistically significant outcome. However, it does appear to be practically significant as 45 pounds weight loss can have substantial effect.

14) Gender selection: A chance of 1% (significance level 0.01) is statistically significant.Therefore the technique appears to be statistically significant. It doesnot appear to be practically significant.

15) Guessing technique: 23% (0.23) chance of getting such results if the program has no effect indicates that the technique doesnot lead to statistically significant difference in guessing success. Moreover, in this case the new technique doesnot confer any practical significance aswell.

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