Given are the data for two
variables, x and y.
xi
6
11
15
18
20
yi
6
8
12
20
30
Enter negative values as negative numbers.
Compute b 1 and b 0 (to
4 decimals).
b 1
b 0
Complete the estimated regression equation (to 2 decimals).
y = + x
Compute the residuals (to 2 decimals if necessary).
x 1
x 2
x 3
x 4
x 5
Consider the following three scatter diagrams of the residuals
against the independent variable. Which of the following is a
accurately represents the data?
Select: Scatter diagram #1, Scatter diagram #2, Scatter
diagram #3
Do the assumptions about the error terms seem to be
satisfied?
Select: Yes, the plot of the residuals suggests that the error term
assumptions are satisfied, No, the plot of the residuals suggests
that the error term assumptions are not satisfied
Compute the standardized residuals (to 2 decimals).
x 1
x 2
x 3
x 4
x 5
Consider the following three scatter diagrams of the
standardized residuals against . Which of the following is a
accurately represents the data? What conclusions can you draw from
this plot?
1.
2.
3.
Select: Scatter diagram #1, Scatter diagram #2, Scatter diagram
#3
The standardized residual plot has the Select: same,
other shape as the original residual plot. The curvature
observed indicates that the assumptions regarding the error
term Select: may not be, may be satisfied.