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368 Data&Statistics Application
Setting Variable Bin Widths
You can set variable bin widths based on a list of bin boundaries.
1. Create a named list containing boundary values.
For example, a boundary list defined as {60,70,100,110} will create bins at
60 to 70, 70 to 100, and 100 to 110.
Note: The data must fall within the specified bin widths. For example, a
data point of 115 would be outside the bins in the above list, and you
would receive a Data/Bin Location Mismatch error.
2. On the Plot Properties menu, click HistogramProperties > BinSettings,
and choose Variable Bin Width.
The Variable Bin Width Settings dialog box opens.
3. Select your boundary list as the List of Bin Boundaries.
4. Click OK to apply the changes and redraw the bins.
Note: You cannot change variable bin widths by dragging their
boundaries; you must edit the list of boundaries or restore equal-width
bins.
Creating a Normal Probability Plot
A normal probability plot shows one set of data against the corresponding
quartile (z) of the standard normal distribution. You can use normal probability
plots to judge the appropriateness of the normal model for your data.
1. Choose or create the data you want to use for a normal probability plot.
Use a named list from Lists&Spreadsheet or Calculator.