Texas Instruments BA II Plus User Manual

96 BA II PLUS™ Calculator
Example: Computing One-Variable Statistical Results
Procedure Keystrokes Display
Select and clear statistical
calculation portion of Statistics
worksheet.
& k
& z
LIN
Select one-variable calculation
method.
& V
& V
& V
& V
1-V
Display sample size.
#
n= 10.00

Display mean.
#
x
= 70.80

Display sample standard deviation.
#
Sx= 4.08

Two-Variable Statistics Example
A life insurance company wants to explore the relationship
between the number of salespeople in an office and the volume
of sales. Offices in various cities have the following number of
salespeople and resulting total sales.
Number of salespeople Sales $ per month
7 99,000
12 152,000
4 81,000
5 98,000
11 145,000
9 112,000
Treating the number of salespeople as the
X
variable and the
sales per month as the
Y
variable, use the linear regression
model to perform the following analysis.
•
Determine the Y-intercept, slope, and correlation coefficient
of the data.
•
Predict the amount of sales (
Y'
) if the company establishes a
new office with 10 salespeople.
•
Determine the number of salespeople needed (
X'
) to
produce $115,000 in monthly sales.

Texas Instruments BA II Plus Specifications

General

Type	Financial
Cover	-
Form factor	Pocket
Control type	Buttons
Product color	Black
Digits	10 digits
Display tilting	No
Display number of lines	1 lines
Memory registers	10
Power source	Battery