Question: For the shipment data listed in Exercise 18.45, construct a first-order autoregressive forecasting equation and make a forecast for period 19. In exercise Yt 68.3

For the shipment data listed in Exercise 18.45, construct a first-order autoregressive forecasting equation and make a forecast for period 19.
In exercise

Yt 68.3 13 141.3 2 56.7 8 7. 14 149.6 3 79.5 9 104.2 15 177.1 4 534 10 04.2 16 193.6 5 59.7 15.4 17 238.9 86.6 18 259.2 65.6 2 2 6 71 12

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