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Abstract The classic procedure for constructing a confidence band around a regression function is that of Scheffé (1959), which provides a band of infinite length. This band can be unnecessarily wide if the region of interest to the experimenter is finite. A class of sets is defined that restricts the range of the predictor variables. Confidence bands for a regression function over are constructed, which, for fixed α, are narrower than the Scheffé bands. Also, a procedure is illustrated by which sets that are not in the class can be embedded in Tables are provided to facilitate the use of the procedure.
Casella et al. (Mon,) studied this question.