10: Running Total and Statistics 137
File name : English-M02-1-040308(Print).doc Print data : 2004/3/9
*
Selects
MINUTES
as
x
-list,
SALES
as
y
-list, indicates
current curve-fitting
model, and displays
FRCST menu.
Correlation coefficient for
linear model.
The correlation coefficient calculated above is acceptable to BJ’s. Using
the linear model, estimate what the level of sales would be if the
business purchased 7 minutes of advertising time per week.
7
Stores 7 in variable
MINUTES.
Forecasts the sales
resulting from 7 minutes of
radio advertising.
How many minutes of advertising should BJ’s buy if it wants to attain
sales of $3,000
?
3000
The business should buy
about 6 minutes of
advertising for sales of
$3,000.
†
*
If the model named here is not the one you want to use, press
and select the one you want.
†
This result is not the same as it would be if
SALES
were the independent (
x
)
variable, and
MINUTES
were the dependent (
y
) variable.
