
Statistic Denition
ẏ Mean of y- (dependent) values.
ΣY Sum of y-values.
ΣY
2
Sum of y
2
-values.
sY The sample standard deviation of the dependent column.
σY The population standard deviation of the dependent column.
serrY The standard error of the dependent column.
ssY Sum of the squared deviations of Y.
Plotting statistical data
Once you have entered your data, selected the data set to analyze and specied your t model, you can plot
your data. You can plot up to ve scatter plots at a time.
1. In Symbolic view, select the data sets you want to plot.
2. Make sure that the full range of your data will be plotted. You do this by reviewing (and adjusting, if
necessary), the
X Rng and Y Rng elds in Plot Setup view. ( ).
3.
Press .
If the data set and regression line are not ideally positioned, press and select Autoscale.
Autoscale can be relied upon to give a good starting scale which can then be adjusted later in the Plot
Setup view.
256 Chapter 12 Statistics 2Var app
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