Q21 Below you are given the first two values of a time series. You are also given the first two values of the exponenti

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Q21

Below you are given the first two values of a time series. You are
also given the first two values of the exponential smoothing
forecast.









Time Period (t)

Time Series Value
(Yt)

Exponential Smoothing Forecast (Ft)






















1
18
18






















2
22
18






















If the
smoothing constant equals .2, then the exponential smoothing
forecast for time period 3 is













a.
18

























b.
18.8

























c.
21.2

























d.
40