94 Section 6: Statistics Functions
File name: HP 12c Pt Converted_user's guide_English_HDP0F123E02_080207
Page: 11 of 281
Printed Date:
{
2007/8/2Dimension: 14.8 cm x 21 cm
The table below shows where the accumulated statistics are stored.
Register Statistic
R
1
(and display)
n
: number of data pairs accumulated.
R
2
Σ
x
: summation of
x-
values.
R
3
Σ
x
2
: summation of squares of
x-
values.
R
4
Σ
y
: summation of
y-
values.
R
5
Σ
y
2
summation of squares of
y-
values.
R
6
Σ
xy
: summation of products of
x-
values and
y-
values.
Correcting Accumulated Statistics
If you discover you have entered data incorrectly, the accumulated statistics can
easily be corrected. Simply key in the incorrect data point or data pair again as if
it were new, but press
g^
instead of
_
. Then enter the correct data point or
data pair and press
_
.
Mean
Pressing
gÖ
calculates the means (arithmetic averages) of the
x-values
(
x
) and
of the
y-value
s (
y
). The mean of the
x-values
appears in the display after
gÖ
is
pressed; to display the mean of the
y-values
, press
~
.
Example:
A survey of seven salespersons in your company reveals that they work
the following hours a week and sell the following dollar volumes each month. How
many hours does the average salesperson work each week
?
How much does the
average salesperson sell each month
?
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Страница 1: ...HP 12c Platinum Financial Calculator User s guide H Edition 5 HP part number F2231AA 90001 ...
Страница 15: ...Part I Problem Solving ...
Страница 48: ...48 Section 3 Basic Financial Functions ...
Страница 92: ...92 Section 5 Additional Operating Features Keystrokes RPN mode Display 987z 434 65 The correct answer ...
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Страница 105: ...Part II Programming ...
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Страница 157: ...Part III Solutions ...
Страница 216: ...216 Section 14 Leasing Keystrokes RPN mode Keystrokes ALG mode Display fL12 fL 12 18 10 Annual yield to lessor ...
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