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Statistical Calculations
The HP can also be used for several types of statistical calculations.
Mean and Standard Deviation (
What's the mean (average) and standard deviation (
E
Use the
+ key to enter data:
CLEAR ALL
E
+
150
E
+
95
E
+
260
Determine the mean and standard deviation by simply pressing
x, y
S
Linear Regression
Beta coefficients can be calculated by using the HP's linear regression capabilities. The X (independent
variable) and Y (dependent variable) values must be entered in the proper sequence, where the X data is
on the horizontal axis (market) and Y data is on the vertical axis (stock).
F
)
Year
1994
1995
1996
A number 1 is displayed.
A number 2 is displayed.
A number 3 is displayed.
_ _
The mean equals $168.33.
, S
The standard deviation is $84.01.
x
y
deviations.
Year
Market (k
____
__________
1
2
3
4
Sales
$150
95
260
F
) of sales over the 3 years?
F
F
and
refer to population statistics.
x
y
)
Stock (k
________
M
23.8%
38.6%
-7.2
-24.7
6.6
12.3
20.5
Hewlett-Packard 10B Tutorial
and
are sample standard
)
j
8.2
Page 11
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