If all the points in a scatter diagram lie on a downsloping least squares regression line, then
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Question:
If all the points in a scatter diagram lie on a downsloping least squares regression line, then the coefficient of correlation:
a.
must be either 1.0 or -1.0. This is answer
b.
must be-1.0.
c.
must be 0.
d.
must be 1.0.
The regression line = 3 + 2x has been fitted to the data points (4,8), (2,5), and (1,5). The residual sum, of squares will be:
a.
22.
b.
13.
c.
10.
d.
15.
Expert Answer:
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