Suppose that different amounts of fertilizer had been used in different fields that were involved in the
Question:
(a) Explain how the use of different amounts of fertilizer confounds the experimental analysis in the absence of randomization.
(b) Considering the regression models used in Chapter 25, if the amounts of fertilizer were known, how could an analyst adjust for this confounding effect?
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Related Book For
Statistics For Business Decision Making And Analysis
ISBN: 9780321890269
2nd Edition
Authors: Robert Stine, Dean Foster
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