In completing their review of the previous model, Garcia cautions the analysts to be aware of
the various types of uncertainty that can arise when predicting the dependent variable using a
linear regression model. She identifies two errors that result in the forecast of the dependent
variable having a standard error larger than the standard error of the regression:
Error1: Model error
Error 2: Sampling error
Q3. Is Garcia correct about the errors affecting the standard error of the forecast of the
dependent variable?7
A. Yes
B. No, she is incorrect about Error 1
C. No, she is incorrect about Error 2
Solution: B
没明白为什么model error是错误的
