Compare the [b]T[/b] and standard normal curves.

[list][br][*]Use the "df" slider to change the [b]degrees of freedom[/b].[br][*]Compare the T distribution and the Standard Normal Curve for various degrees of freedom. [br][*]Check the "Show Areas" checkbox to compare areas under the curve.[br][*]Drag the green triangles on the x-axis to change the areas.[br][/list]