6. A scatter plot of the residuals NORMAL FLOAT AUTO REAL RADIAN MP from a linear regression are shown
at the right. The plots are (1,1.3),
(2.-2.2), (3,1.6), (4,-1.1), and
(5,0.4). Which statement is true
about the sum of the residuals?
Choose:
o The sum is positive.
o The sum equals zero.
o The sum is negative.
o The sum is unknown.
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