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Consider a Time Series with 15 Quarterly Sales Observations

Question 113

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Consider a time series with 15 quarterly sales observations. Using the quadratic trend model, the following partial computer output was obtained.
Consider a time series with 15 quarterly sales observations. Using the quadratic trend model, the following partial computer output was obtained. What is the predicted value of y when t = 20? What is the predicted value of y when t = 20?

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