Concept explainers
Polynomial Models Use a graphing calculator to do the following cubic and quartic regression problems. (See Examples 5 and 6.)
Consumer Confidence The Conference Board's consumer confidence index (CCl) is listed for the years 2008 to 2015 in the table below. (Data from: The Conference Board.)
Year | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 |
CCI | 88 | 40 | 57 | 65 | 62 | 58 | 79 | 104 |
a. Plot the data with
b. Use quartic regression to find a fourth-order polynomial function
c. Graph
d. What does the model estimate for the CCI in 2015? Is this close to the actual index value shown in the table?
Want to see the full answer?
Check out a sample textbook solutionChapter 3 Solutions
EBK MATHEMATICS WITH APPLICATIONS IN TH
- sy = f(x) + + + + + + + + + X 3 4 5 7 8 9 The function of shown in the figure is continuous on the closed interval [0, 9] and differentiable on the open interval (0, 9). Which of the following points satisfies conclusions of both the Intermediate Value Theorem and the Mean Value Theorem for f on the closed interval [0, 9] ? (A A B B C Darrow_forward= Q6 What will be the allowable bearing capacity of sand having p = 37° and ydry 19 kN/m³ for (i) 1.5 m strip foundation (ii) 1.5 m x 1.5 m square footing and (iii)1.5m x 2m rectangular footing. The footings are placed at a depth of 1.5 m below ground level. Assume F, = 2.5. Use Terzaghi's equations. 0 Ne Na Ny 35 57.8 41.4 42.4 40 95.7 81.3 100.4arrow_forwardQ1 The SPT records versus depth are given in table below. Find qan for the raft 12% foundation with BxB-10x10m and depth of raft D-2m, the allowable settlement is 50mm. Elevation, m 0.5 2 2 6.5 9.5 13 18 25 No.of blows, N 11 15 29 32 30 44 0 estigate shear 12%arrow_forward
- Glencoe Algebra 1, Student Edition, 9780079039897...AlgebraISBN:9780079039897Author:CarterPublisher:McGraw HillFunctions and Change: A Modeling Approach to Coll...AlgebraISBN:9781337111348Author:Bruce Crauder, Benny Evans, Alan NoellPublisher:Cengage LearningTrigonometry (MindTap Course List)TrigonometryISBN:9781305652224Author:Charles P. McKeague, Mark D. TurnerPublisher:Cengage Learning
- College AlgebraAlgebraISBN:9781305115545Author:James Stewart, Lothar Redlin, Saleem WatsonPublisher:Cengage LearningAlgebra and Trigonometry (MindTap Course List)AlgebraISBN:9781305071742Author:James Stewart, Lothar Redlin, Saleem WatsonPublisher:Cengage LearningBig Ideas Math A Bridge To Success Algebra 1: Stu...AlgebraISBN:9781680331141Author:HOUGHTON MIFFLIN HARCOURTPublisher:Houghton Mifflin Harcourt