SEGMENT

MARKETING

R$($thousands$)$

SALES

R$($thousands$)$

$1146$

$2113$

$3155$

$4165$

$52415$

$62818$

$72217$

$82112$

$92615$

$104320$

$113414$

$1295$

$3\mathrm{.}1$ Using the provided information, determine the forecast of solar panels for the next period and demonstrate

how this would change if the smoothing constant were adjusted to $0\mathrm{.}6.$

$(6$

marks$)$

Explain the difference in terms of alpha and responsiveness.

$3\mathrm{.}2$ Given that for electric vehicle washers the seasonal $($quarterly$)$ indices are Quarter $1=1\mathrm{.}5$ Quarter $2=0\mathrm{.}8$

Quarter $3=1\mathrm{.}1$ and Quarter $4=0\mathrm{.}6.$

$(4$

marks$)$

Calculate the seasonally adjusted forecast for the electric vehicle washers for Quarters $5-8?$

$3\mathrm{.}3$ Using the provided information calculate a regression line for the data provided.

$(10$

marks