TABLE 12-10
The management of a chain electronic store would like to develop a model for predicting the weekly sales (in thousand of dollars) for individual stores based on the number of customers who made purchases. A random sample of 12 stores yields the following results:

-Referring to Table 12-10, the residual plot indicates possible violation of which assumptions?
A) linearity of the relationship
B) homoscedasticity
C) autocorrelation
D) normality

Question

TABLE 12-10
The management of a chain electronic store would like to develop a model for predicting the weekly sales (in thousand of dollars) for individual stores based on the number of customers who made purchases. A random sample of 12 stores yields the following results:
 
-Referring to Table 12-10, the residual plot indicates possible violation of which assumptions?
A) linearity of the relationship 
B) homoscedasticity 
C) autocorrelation 
D) normality

Quizplus · Accepted Answer

Residual plots are used to check for homoscedasticity; if the residuals fan out or form a pattern, it indicates a violation of this assumption.

TABLE 12-10 the Management of a Chain Electronic Store Would Like to Like