Standard Deviation - HP 12C Platinum Owner's Handbook Manual

78 Section 6: Statistics Functions
Salesperson
1
2
3
4
5
6
7
To find the average workweek and sales of this sample:
Keystrokes
fCLEAR²
32\
17000_
40\
25000_
45\
26000_
40\
20000_
38\
21000_
50\
28000_
35\
15000_
gÖ
~

Standard Deviation

Pressing gv calculates the standard deviation of the x-values (s
y-values (s ). (The standard deviation of a set of data is a measure of the
y
dispersion around the mean.) The standard deviation of the x-values appears in
the display after v is pressed; to display the standard deviation of the y-values,
press ~.
Hours/Week
32
40
45
40
38
50
35
Display
Clears statistics registers.
0.00
32.00
First entry.
1.00
40.00
Second entry.
2.00
45.00
Third entry.
3.00
40.00
Fourth entry.
4.00
38.00
Fifth entry.
5.00
50.00
Sixth entry.
6.00
35.00
Total number of entries in the
7.00
sample.
Mean dollar sales per month ( ).
21,714.29
Mean workweek in hours ( ).
40.00
Hours/Week
$17,000
$25,000
$26,000
$20,000
$21,000
$28,000
$15,000
x
y
) and of the
x