Contents
- Index
Analysis Menu
Contains the following menu items:
Test Distribution: Tests whether the selected distribution displayed in the Data window fits the corresponding data. The results are displayed in the Test Distribution window. Shortcuts are to click the Test Distribution button on the toolbar or in the Data window.
Find Best Distribution: Determines the best distribution to fit to the data. Fits all the available distributions using both the method of moments and maximum likelihood methods, with and without pre-transforming the data. Returns the distribution giving the highest p-value per the Skewness Kurtosis All test. The result is displayed in the Selected Distribution box of the Data window. Shortcuts are to click the Find Best Distribution button on the toolbar or in the Data window.
View Skewness-Kurtosis Plot: Displays a skewness-kurtosis plot in a Skewness-Kurtosis Plot window summarizing the shapes each distribution can take and illustrating relationships between the different distributions. This is primarily a learning tool. However, if data exists, its location is shown on the plot. Shortcuts are to click the View Skewness-Kurtosis Plot button on the toolbar or in the Data window.
Select Distribution: Displays the Distribution submenu for selecting a specific distribution to fit to the data. When a distribution is selected, it is fit to the data using both method of moments and maximum likelihood. The best fit is returned. The following distributions and family of distributions can be fit: Beta, Exponential, Negative Exponential, Largest Extreme Value, Smallest Extreme Value, Gamma, Johnson, Loglogistic, Lognormal, Normal, Pearson and Uniform. In addition there is a Custom... menu item that displays the Select Distribution to Fit dialog box allowing complete control in fitting the data including the method of fitting the data, whether pre-transformation are performed and more. Shortcuts are to click the Select Distribution button on the toolbar or in the Data window. The difference between selecting the No Transformation menu item and the Normal menu item is that the No Transformation menu item does not transform the data (Y=X) and the Normal menu item transforms the data using the transformation Y = (X-Average) / Standard Deviation.
Fill Order/Group Column: Displays the Fill Order/Group Column dialog box for generating patterned data for the groups and order columns in the Data window. This saves time relative to typing the information into this columns.
Generate Random Values: Displays the Generate Random Values dialog box for generating example sets of data from any of the available distributions. This is a learning tool. A shortcut is to click the Generate Random Values button on the toolbar.
Dice Experiments: Displays the Dice Experiments dialog box for generating example sets of data based on experiments involving rolling dice. This is a learning tool.
Options: Displays the Analysis Options dialog box for specifying default options for calculating tolerance intervals, confidence statements, and testing for normality. A shortcut is to click the Options button on the toolbar.
Show Toolbar: By default, the toolbar is displayed. This menu item can be used to remove the toolbar.
Display Tabs at Bottom: By default, the tabs in the Data and Test Distribution windows are displayed at the bottom. This menu item can be used to move the tabs to the top of the window.