HP 39gII, Руководство пользователя

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Statistics 2Var app 93
Here are the statistics displayed when you press .
Plotting
Once you have entered your data (
M
), defined your
data set and your fit model (
Y
), you can plot your
data. You can plot up to five scatter plots at a time.
To plot statistical
data
1. In Symbolic view (
Y
), select ( ) the data sets
you want to plot.
2. Adjust the plotting scale and range in the Plot Setup
view.
3. Press
P
. If you have not adjusted the Plot Setup
yourself, you can try V select
Auto Scale
.
Auto Scale can be relied upon to give a good starting
scale which can then be adjusted in the Plot Setup.
Tracing a Scatter
Plot
The numbers below the plot
indicate that the cursor is at
the first data point for
S1
, at
(1, 6). Press
>
to move to
the next data point and
display information about it.
Statistic Definition
Mean of
y
- (dependent) values.
Σ
Y
Sum of
y
-values.
Σ
Y
2
Sum of
y
2
-values.
sY
The sample standard deviation of
the dependent column.
Y
The population standard deviation
of the dependent column.
serrY
The standard error of the
dependent column.
y
σ