Statistical Calculations 117
At what temperature would the manager predict to sell 800 drinks? How many employees
will be needed for tomorrow's predicted temperature of 43
o
C?
Continuing with this example, modify this data by adding more points: two additional days
of sales and their corresponding temperatures. The first day’s temperature of 43
o
C resulted in
the sale of 1,023 cold drinks. The next day’s temperature at 37
o
C resulted in the sale of 685
drinks.
Table 12-3 Example entering statistical data, opening the editor, and predicting
Keys
Display
Description
\t
STAT CLR
(message flashes briefly,
then disappears)
Clears the statistics memory.
DGÆYJV¡
1.00
Enters first ordered pair.
DVÆVJV¡
2.00
Enters the second ordered pair.
DgÆjGV¡
3.00
Enters the third ordered pair.
v¡
1 32.00
Open the editor. Displays
X
annunciator.
11111
3 725.00
Scroll and verify the data points,
starting with the
x
-value of the
first pair. The
y
-value of the third
pair is displayed.
M
Exit the editor.
]LY
0.00
Set the regression model to
power.
4–POWER
flashes briefly
after
Y
is pressed, then
disappears.
g::\Z
39.49
Predict the temperature.
\«\5d
.988080878
Display the correlation
coefficient.
YD\W\5G
1,053.49
Predict the number of drinks sold
tomorrow.
aG::4
5.27
Manager should have at least 6
employees at work tomorrow to
cover the expected load.
Summary of Contents for 10bII+
Page 1: ...i HP 10bII Financial Calculator User s Guide HP Part Number NW239 90001 Edition 1 May 2010 ...
Page 3: ...iii HP 10bII Financial Calculator ...
Page 30: ...At a Glance 22 ...
Page 144: ...Statistical Calculations 136 ...
Page 183: ...Warranty Regulatory and Contact Information 9 ...
Page 184: ...Warranty Regulatory and Contact Information 10 ...