American Black Bears (Refer to Problem 30, Section 4.1.) The American black bear (Ursus americanus) is one of eight bear

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American Black Bears (Refer to Problem 30, Section 4.1.)
The American black bear (Ursus americanus) is one of
eight bear species in the world. It is the smallest North
American bear and the most common bear species on the
planet. In 1969, Dr. Michael R. Pelton of the University of
Tennessee initiated a long-term study of the population in
Great Smoky Mountains National Park. One aspect of the
study was to develop a model that could be used to
predict a bear's weight (since it is not practical to weigh
bears in the field). One variable thought to be related to
weight is the length of the bear. The data below represent
the lengths of 12 American black bears.
Total Length CM X: 139.0, 138.0, 139.0, 120.5, 149.0, 141,
141, 150, 166, 151.5,129.5, 150
Weight KG Y: 110,60,90,60, 85, 100,95,85,155, 140, 105,
110
(a) Find the least-squares regression line, treating total
length as the explanatory variable and weight as the
response variable.
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