what is indicated when the actual future Y variable values of forecast sales beg

Question

what is indicated when the actual future Y variable values of forecast sales begin to fall outside of the forecast confidence interval?

a) the forecaster should collect more recent sales data and rerun or revise the regression model

b) the forecaster should adust the forecast up or down depending on the direction of the new actual sales data

c) the forecaster should stick with the existing model since the date will likely begin to fall with the confidence interval

d) the forecaster should tak a hard look at thow the new sales data were collected since there is likely measurement error.

Explanation / Answer

When the actual future Y variable values of forecast begin to fall outside of the forecast confidence interval then this indiactes that the forecaster should take a hard look at the new sales data were collected since there is likely measurement error.

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