Answer
(c) prediction of gas used from degree-days will be quite accurate
Work Step by Step
r = 0.98 implies that 98% increase in gas usage can be explained by the equation, hence the prediction will be quite accurate.
The Basic Practice of Statistics 7th Edition
by Moore, David S.; Notz, William I.; Fligner, Michael A.
Published by
W. H. Freeman
ISBN 10:
146414253X
ISBN 13:
978-1-46414-253-6
Chapter 5 - Regression - Check Your Skills - Page 153: 5.28
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