Texas Instruments BA II Plus User Manual

6: Statistics Worksheet 95
One-Variable Statistics Example
You randomly select a sample of 10 stores to see how much
they charge for a particular item. You find the following prices:
$63, $69, $71, $69, $74, $74, $72, $66, $74, $76
Note that $69 occurs twice and $74 occurs three times. You can
save time entering by using the frequency factor (
Y
nn
) for
them.
Find the mean and the sample standard deviation.
Example: Entering One-Variable Statistical Data
Procedure Keystrokes Display
Select and clear data-entry
portion of Statistics worksheet.
& j
& z
X01 0.00
Enter data set.
63
!
#
X01=
Y01=
63.00

1.00

#
69
!
#
2
!
X02=
Y02=
69.00

2.00

#
71
!
#
X03=
Y03=
71.00

1.00

#
74
!
#
3
!
X04=
Y04=
74.00

3.00

#
72
!
#
X05=
Y05=
72.00

1.00

#
66
!
#
X06=
Y06=
66.00

1.00

#
76
!
#
X07=
Y07=
76.00

1.00


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