the samplng Sampling Method InExerciss9-12, determine whether to be sound or is
ID: 3067792 • Letter: T
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the samplng Sampling Method InExerciss9-12, determine whether to be sound or is flawed Titl following question was Se the USA Today website: "In your view, are nuclear plants safe?" The survey sio net users who chose to respond to the question posted on the elecoJets 10. Clinical Trials Researchers at Yale University conduct a wide variet using subjects who volunteer after reading advertisements soliciting paid voluntinic 11. Credit Card Payments In an AARP. Inc. survey of 1019 randomly sel was asked how much credit card debt he or she pays off each month. 12. Smartphone Usage In a survey of smartphone ownership, the Pew R of USA To of clinical trial 9. Nuclear Power Plants In a survey of 1368 subjects, the following question selected adults Center ra domly selected 1006 adults in the United States. Statistical Significance and Practical Significance. In Exercises 13-16, dete results appear to have practical significance. whether the resuls appear to have statistical signtfcance, and also determine whethea 13. Diet and Exercise Program In a study of the Kingman diet and exercise 40 subjects lost an average of 22 pounds. There is about a 1% chance of getting such re a program that has no effect. gran ults with 14. MCAT The Medical College Admissions Test (MCAT) is common decision-making process for determining which students to accept into medical school effectiveness of the Siena MCAT preparation course, 16 students take the MCAT used as part of the s.To test the test, thern complete the preparatory course, and then they retake the MCAT test, with the result that the aver. age (mean) score for this group rises from 25 to 30. There is a 0.3% chance of getting those result by chance. Does the course appear to be effective? 15. Gender Selection In a study of the Gender Aide method of gender selection used to increase the likelihood of a baby being born a girl, 2000 users of the method gave birth to 980 boys and 1020 girls. There is about a 19% chance of getting that many girls if the method had no effect 16. IQ Scores Most people have IQ scores between 70 and 130. For $39.99, you can pur chase a PC or Mac program from HighlQPro that is claimed to increase your IQ score by 10 training market," but the author of your text could find no data supporting that claim,so suppose that these results were obtained: In a study of 12 subjects using the program. e program claims to be "the only proven IQ increasing software in the brain the results if average increase in IQ score is 3 IQ points. There is a 25% chance of getting suc the program has no effect. n Exercises 17-20, refer to the sample of boduExplanation / Answer
14)
Yes, the program is statistically significant because the results are not likely to occur by chance (0.003)
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