b. |
Forecast September sales volume using each of the following: |

(1) | A linear trend equation.(Round your intermediate calculations and final answer to 2 decimal places.) |

Y_{t} |
[removed] thousands |

(2) | A five-month moving average. (Round your answer to 2 decimal places.) |

Moving average | [removed] thousands |

(3) | Exponential smoothing with a smoothing constant equal to .40, assuming a March forecast of 16(000). (Round your intermediate forecast values and final answer to 2 decimal places) |

Forecast | [removed] thousands |

(4) | The naive approach. |

Naive approach | [removed] thousands |

(5) | (Round your answer to 2 decimal places.) |