Answer: The article Readability of Liquid Crystal
Chapter 0, Problem 14.28(choose chapter or problem)
The article Readability of Liquid Crystal Displays: A Response Surface (Human Factors [1983]: 185190) used the estimated regression equation to describe the relationship between y error percentage for subjects reading a four-digit liquid crystal display and the independent variables x1 level of backlight, x2 character subtense, x3 viewing angle, and x4 level of ambient light. From a table given in the article, SSRegr 19.2, SSResid 20.0, and n 30.a. Does the estimated regression equation specify a useful relationship between y and the independent variables? Use the model utility test with a .05 significance level. b. Calculate R2 and se for this model. Interpret these values. c. Do you think that the estimated regression equation would provide reasonably accurate predictions of error rate? Explain.
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