These applets, presented by Virginia Tech's Department of Statistics, address the notion of "power." Users can perform one or two tailed tests for proportions or means for one or two samples. Set the parameters and...
This resource, created by author Will G. Hopkins, defines what a p-value is, why .05 is significant, and when to use it. It also covers related topics such as one-tailed/two-tailed tests and hypothesis testing. Overall...
The user is be able to change the mean and the standard deviation using the sliders and see the density change graphically. The check buttons (68, 95, 99) will help one realize the appropriate percentages of the area...
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