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38.) Given Phoebe doesn't trust her combination of data and regression model, which approach would give her the best chance of overcoming her concerns? Assume she can implement whatever plan she comes up with. a.) Increase her sample size b.) Use weighted least squares instead of ordinary least squares c.) Use a 99.9% confidence level d.) Randomly send some kids home from school with books, and randomly assgning others to get no extra books. Check back in 5 years and observe the average number of cavities for these two groups.

38.) Given Phoebe doesn't trust her combination of data and regression model, which approach would give her the best chance of overcoming her concerns? Assume she can implement whatever plan she comes up with. a.) Increase her sample size b.) Use weighted least squares instead of ordinary least squares c.) Use a 99.9% confidence level d.) Randomly send some kids home from school with books, and randomly assgning others to get no extra books. Check back in 5 years and observe the average number of cavities for these two groups.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter4: Equations Of Linear Functions
Section: Chapter Questions
Problem 8SGR
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38.) Given Phoebe doesn't trust her combination of data and regression model, which approach would give her the best chance of overcoming her concerns? Assume she can implement whatever plan she comes up with. a.) Increase her sample size b.) Use weighted least squares instead of ordinary least squares c.) Use a 99.9% confidence level d.) Randomly send some kids home from school with books, and randomly assgning others to get no extra books. Check back in 5 years and observe the average number of cavities for these two groups. 39.) Which of the following is not a problem with having tons of right hand side variables? a.) Multicollinearity b.) Unobserved confounders c.) Poor measures of characteristics that are hard to define d.) Violation of the Akaike Information Criterion
Transcribed Image Text:38.) Given Phoebe doesn't trust her combination of data and regression model, which approach would give her the best chance of overcoming her concerns? Assume she can implement whatever plan she comes up with. a.) Increase her sample size b.) Use weighted least squares instead of ordinary least squares c.) Use a 99.9% confidence level d.) Randomly send some kids home from school with books, and randomly assgning others to get no extra books. Check back in 5 years and observe the average number of cavities for these two groups. 39.) Which of the following is not a problem with having tons of right hand side variables? a.) Multicollinearity b.) Unobserved confounders c.) Poor measures of characteristics that are hard to define d.) Violation of the Akaike Information Criterion
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