Investigate each of the forty delivery time observations. Delete at random ten percent (4) of the observations. Calculate R2 and make a prediction based on the four values that were deleted. Recalculate 100 times. Estimate R2's value. What kind of impact does this have on the model's prediction? How does the mean of the 100R2 prediction values compare to
Investigate each of the forty delivery time observations. Delete at random ten percent (4) of the observations. Calculate R2 and make a prediction based on the four values that were deleted. Recalculate 100 times. Estimate R2's value. What kind of impact does this have on the model's prediction? How does the mean of the 100R2 prediction values compare to
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Investigate each of the forty delivery time observations. Delete at random ten percent (4) of the observations. Calculate R2 and make a prediction based on the four values that were deleted. Recalculate 100 times. Estimate R2's value. What kind of impact does this have on the model's prediction? How does the mean of the 100R2 prediction values compare to the R2 that is derived from the PRESS for each of the 40 observations?
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