The U.S. Air Force uses regression models for cost estimating, an application that almost always involves outliers.
Question:
The U.S. Air Force uses regression models for cost estimating, an application that almost always involves outliers. Simpson and Montgomery [1998a] present 19 observations on first-unit satellite cost data \((y)\) and the weight of the electronics suite \((x)\). The data are shown in the following table.
a. Draw a scatter diagram of the data. Discuss what types of outliers may be present.
b. Fit a straight line to these data with OLS. Does this fit seem satisfactory?
c. Fit a straight line to these data with an \(M\)-estimator of your choice. Is the fit satisfactory? Discuss why the \(M\)-estimator is a poor choice for this problem.
d. Discuss the types of estimators that you think might be appropriate for this data set.
Step by Step Answer:
Introduction To Linear Regression Analysis
ISBN: 9781119578727
6th Edition
Authors: Douglas C. Montgomery, Elizabeth A. Peck, G. Geoffrey Vining