A first-order autoregressive model for stock sales is: $\text { Sales } _ { i } = 800 + 1.2 \left( \text { Sales } )_ { i - 1 } \right. \text {. }$ .
If sales in 2012 is 6,000, the forecast of sales for 2013 is __________.

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The Answer of A first-order autoregressive model for stock sales is: $\text { Sales } _ { i } = 800 + 1.2 \left( \text { Sales } )_ { i - 1 } \right. \text {. }$ .
If sales in 2012 is 6,000, the forecast of sales for 2013 is __________.

A First-Order Autoregressive Model for Stock Sales Is Sales i=800+1.2( Sales )i−1. \text { Sales } _ { i } = 800 + 1.2 \left( \text { Sales } )_ { i - 1 } \right. \text {. } Sales i​=800+1.2( Sales )i−1​.

A First-Order Autoregressive Model for Stock Sales Is $\text { Sales } _ { i } = 800 + 1.2 \left( \text { Sales } )_ { i - 1 } \right. \text {. }$