98
BA II PLUS™ Calculator
Example: Computing Two-Variable Statistical Results
(continued from previous example)
Procedure
Keystrokes
Display
Select and clear statistical
calculation portion of
Statistics worksheet.
&
k
&
z
LIN
Display intercept.
#
#
#
#
#
#
#
#
a=
47,115.38
Display slope.
#
b=
8,423.08
Display correlation.
#
r=
0.96
Enter X' (people).
#
10
!
X'=
10.00
Compute Y' (sales).
#
%
Y'=
131,346.15
Enter Y' (sales).
115000
!
Y'=
115,000.00
Compute new X' (people).
"
%
X'=
8.06
Because the correlation coefficient (
r
) of .96 is close to 1, the
following equation is a good approximation of the data.
Y = 47,115.38 + 8,423.08 × X
The analysis indicates that 10 salespeople would produce
approximately $131,346.15 in sales per month. To produce
$115,000 in sales per month, you would need approximately
eight salespeople.
