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MCS,PHD
Argosy University/ Phoniex University/
Nov-2005 - Oct-2011
Professor
Phoniex University
Oct-2001 - Nov-2016
Cost of modifying a naval fleet. A naval base is considering modifying or adding to its fleet of 48 standard aircraft. The final decision regarding the type and number of aircraft to be added depends on a comparison of cost versus effectiveness of the modified fleet. Consequently, the naval base would like to model the projected percentage increase y in fleet effectiveness by the end of the decade as a function of the cost x of modifying the fleet. A first proposal is the quadratic model
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The data provided in the accompanying table were collected on 10 naval bases of a similar size that recently expanded their fleets. The data were used to fit the model, and the SAS printout of the multiple regression analysis is reproduced on p. 434.
(a) Construct a residual plot versus x. Do you detect any trends? Any outliers?

b) Interpret the influence diagnostics shown on the printout. Are there any observations that have large influence on the analysis?

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