1) Find the slope of the simple regression =
b0 + b1x.
X Y
3 9
5 13
9 10
13 23
15 35
Select one:
a. 2.595
b. 1.109
c. -2.221
d. 1.884
2) If the residuals from a fitted regression violate the
assumption of homoscedasticity, we know that:
Select one:
a. they are normally distributed.
b. they are independent of one another.
c. their variance is not constant.
d. there are extreme outliers.
3) A fitted regression Profit = -570 + 30 Sales (all variables
in thousands of dollars) was estimated from a random sample of 20
pharmacies. For a pharmacy with Sales = 10, we predict that Profit
will be:
Select one:
a. 3570.
b. 2430.
c. -270.
d. 870.