The following seasonal indexes and linear trend were computed from five year quarterly sales data.
Trend line is $$\hat { y } = 500 + 30 t , ( t = 1,2,3 , \ldots .20 )$$ $$\begin{array} { | c | c }
\hline \text { Quarter } & \text { Sea50nal Index } \
\hline 1 & 1.4 \
\hline 2 & 1.2 \
\hline 3 & 0.9 \
\hline 4 & 0.5 \
\hline
\end{array}$$ Forecast the sales for the next four quarters

Question

The following seasonal indexes and linear trend were computed from five year quarterly sales data.
Trend line is $$\hat { y } = 500 + 30 t , ( t = 1,2,3 , \ldots .20 )$$ $$\begin{array} { | c | c } 
\hline \text { Quarter } & \text { Sea50nal Index } \
\hline 1 & 1.4 \
\hline 2 & 1.2 \
\hline 3 & 0.9 \
\hline 4 & 0.5 \
\hline
\end{array}$$ Forecast the sales for the next four quarters

Quizplus · Accepted Answer

The Answer of The following seasonal indexes and linear trend were computed from five year quarterly sales data.
Trend line is $$\hat { y } = 500 + 30 t , ( t = 1,2,3 , \ldots .20 )$$ $$\begin{array} { | c | c } 
\hline \text { Quarter } & \text { Sea50nal Index } \
\hline 1 & 1.4 \
\hline 2 & 1.2 \
\hline 3 & 0.9 \
\hline 4 & 0.5 \
\hline
\end{array}$$ Forecast the sales for the next four quarters

The Following Seasonal Indexes and Linear Trend Were Computed from Five