- Study guides, Class notes & Summaries

BCTC STATS EXAM 1 2024 WITH 100% CORRECT ANSWERS What is a voluntary response sample? - correct answer A sample in which the subjects themselves decide whether to be included in the study. Use common sense to determine whether the given event is either impossible, possible but very unlikely, or possible and likely. (New England beat Denver in a football game by a score of 140 to 100) - correct answer possible, but very unlikely In a study of a weight loss program, 45 subjects lost a...

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4 pages

Written in 2023/2024

Grade A+

ExamVerse

BCTC STATS EXAM 3 QUESTIONS WITH CORRECT DETAILED ANSWERS GRADED A+ conf. = 90% ---> 1.645 (1.645*67/3)^2 = 1349.705136 ~~~ 1350 - Answer-How many adults must be randomly selected to estimate the mean FICO (credit rating) score of working adults in a country? We want 90% confidence that the sample mean is within 3 points of the population mean, and the population standard deviation is 67. conf.= 99% ---> 2.58 a) best point estimate = 153.64 lb b) 99% confidence interval estimate: 2...

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5 pages

Written in 2024/2025

Grade A+

wisdompoint

BCTC STATS EXAM 1 EXAM REPORTED QUESTIONS WITH CORRECT DETAILED ANSWERS Why is a voluntary response sample generally unsuitable for methods of statistics? - Answer-People with special interests are more likely to respond, so the sample is likely to be biased. Based on a study of household incomes of men and women who are married, a researcher concludes that marriage causes people to become wealthier.Do you agree with this conclusion? - Answer-No. There may be a relationship between marital ...

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3 pages

Written in 2024/2025

Grade A+

wisdompoint

BCTC STATS FINAL PRACTICE EXAM QUESTIONS WITH CORRECT DETAILED ANSWERS a) 75.9-61 = 14.9 b) 12.42 c) z= (61-75.9)/1.2 = -12.42 d) Nelson's height is unusual - Answer-With a height of 61in, Nelson was the shortest president of a particular club in the past century. The club presidents of the past century have a mean height of 75.9in. and a standard deviation of 1.2in. a.What is the positive difference between Nelson's height and the mean? b.How many standard deviations is that [the di...

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8 pages

Written in 2024/2025

Grade A+

wisdompoint

voluntary response sample - correct answer A sample in which the subjects themselves decide whether to be included in the study. No, and no - correct answer The x-values are weights measured in September and the y-values are their corresponding weights measured in April of the following spring.That is, is each x-value associated with the corresponding y-value in some meaningful way? In table 2, does it make sense to use the difference between each x-value and the y-value that is in the same c...

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15 pages

Written in 2023/2024

Grade A+

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