Give a brief answer, comment, or explanation for each of the following.
a. What is the difference between e1, e2, . . . , en and the n residuals?
b. The simple linear regression model states that y = a 1bx.
c. Does it make sense to test hypotheses about b?
d. SSResid is always positive.
e. A student reported that a data set consisting of n = 6 observations yielded residuals 2, 0, 5, 3, 0, and 1 from the least-squares line.
f. A research report included the following summary quantities obtained from a simple linear regression analysis:

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