Statistics
4th Edition
ISBN: 9780393929720
Author: David Freedman, Robert Pisani, Roger Purves
Publisher: Norton, W. W. & Company, Inc.
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Question
Chapter 12.1, Problem 2EA
a.
To determine
Find the expected amount of rice produced by an unfertilized plot
b.
To determine
Find each extra ounce of nitrogen fertilizer that can be expected to increase the rice yield by _____.
c.
To determine
Find the predicted value of the rice yield when the amount of fertilizer is 3 ounces of nitrogen.
Find the predicted value of the rice yield when the amount of fertilizer is 4 ounces of nitrogen.
d.
To determine
Check whether the study is an observational study or a controlled experiment.
e.
To determine
Check whether it is possible to trust the prediction for 3 ounces of nitrogen, even though this particular amount was never applied.
f.
To determine
Check whether it is possible to trust the prediction for 100 ounces of nitrogen.
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