Kizspy | Question: 59
(Choose 1 answer)
(See picture)
A. Normality of error
B. Homoscedasticity
C. Independence of errors
D. None of the above
FUOVERFL
A computer software developer would like to use the number of downloads (in thousands) for the trial version of his new shareware to predict the amount of revenue (in thousands of dollars) he can make on the full version of the new shareware. Following is the output from a simple linear regression with the residual plot and normal probability plot obtained from a data set of 30 different sharewares that he has developed:
Download Residual Plot
Normal Probability Plot
120
100
80
60
40
20
0
-20
-40
-60
-80
-100
0.00 20.00 40.00 60.00 80.00 100.00 120.00
Download
120
100
80
60
40
20
0
-20
-40
-60
-80
-100
-3
-2
-1
0
Z Value
1
2
3
Which of the following assumptions appears to have been violated?
Residuals
Residuals
