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| Teaching Since: | May 2017 |
| Last Sign in: | 407 Weeks Ago, 5 Days Ago |
| Questions Answered: | 66690 |
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MCS,PHD
Argosy University/ Phoniex University/
Nov-2005 - Oct-2011
Professor
Phoniex University
Oct-2001 - Nov-2016
Researchers carried out a study to see how y = ultimate deflection (mm), of reinforced ultrahigh toughness cementitious composite beams were influenced by x1 = shear span ratio and x2 = splitting
tensile strength (MPa), resulting in the accompanying data (“Shear Behavior of Reinforced Ultrahigh Toughness Cementitious Composite Beams without Transverse Reinforcement,” J. of Materials in Civil Engr., 2012: 1283–1294)

Carry out a test of model utility. b. Should the interaction predictor be retained in the model? Carry out a test of hypotheses using a significance level of .05. c. The estimated standard deviation of Y when x1 = 3 and x2 = 6 is sY = .555. Calculate and interpret a confidence interval with a 95% confidence level for true average deflection under these circumstances. d. Using the information in (c), calculate and interpret a prediction interval using a 95% confidence level for a future value of ultimate deflection to be observed when x1 = 3 and x2 = 6.
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