A student needs to type a 50-page report and turn it in within 14 days. They recorded their progress over 10 days using the scatterplot below. They used a polynomial function p(d) to model the total number of pages, p, typed after d days. They calculated the coefficient of determination to be 0.33. Can they use this model to predict how many pages they will finish in 13 days? Total Number of Pages 50 45 40 35 30 25 20 15 10 5 p(d) = 0.34d² -0.09d 7²=0.33 3 4 5 6 7 Days 8 9 Yes. The model has a moderate fit, and they can safely extrapolate to d=13. 10 11 12 13 14 No. The model has a weak fit, and no predictions can be made. The student should consider using an expo- nential model instead. No. The model has a moderate fit, and d=13 would be considered an extreme extrapolation value. The student should consider using a linear model instead. Yes. The model has a moderate fit, and they can use interpolation to predict what happens at d=13.
A student needs to type a 50-page report and turn it in within 14 days. They recorded their progress over 10 days using the scatterplot below. They used a polynomial function p(d) to model the total number of pages, p, typed after d days. They calculated the coefficient of determination to be 0.33. Can they use this model to predict how many pages they will finish in 13 days? Total Number of Pages 50 45 40 35 30 25 20 15 10 5 p(d) = 0.34d² -0.09d 7²=0.33 3 4 5 6 7 Days 8 9 Yes. The model has a moderate fit, and they can safely extrapolate to d=13. 10 11 12 13 14 No. The model has a weak fit, and no predictions can be made. The student should consider using an expo- nential model instead. No. The model has a moderate fit, and d=13 would be considered an extreme extrapolation value. The student should consider using a linear model instead. Yes. The model has a moderate fit, and they can use interpolation to predict what happens at d=13.
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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PLEASE asnwers both
Expert Solution
Step 1: Evaluation (61)
We have given coefficients of determination..
means only 33% data is explained by this model.
therefore,
the model has a moderate fit with 33% accuracy.
option (d)
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