$1$

pferences

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a$.$ Forecast September sales volume using each of the following:

$(1)$ The naive approach.

Naive approach

thousands

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

Moving average

thousands

$(3)$ A weighted average using $0\mathrm{.}65$ for August, $0\mathrm{.}05$ for July, and $0\mathrm{.}30$ for June. $($Round your answer to $2$ decimal places.$)$

Weighted average

thousands

Exponential smoothing with a smoothing constant equal to $0\mathrm{.}20,$ assuming a March forecast of $14(000).($Round your intermediate cast values and final answer to $2$ decimal places.$)$

cast

thousands