This applet illustrates the P-value of a test of significance. Or you can specify the true population mean μ and use the GENERATE SAMPLE button to create a random sample from the population, display the observations and sample mean (note that some of the points in the sample may be too far from μ to appear in the display), and calculate the P-value.Ĭlick the "Quiz Me" button to complete the activity.
If you already have a sample mean, enter this value and click UPDATE to display the sample mean on the graph and calculate the P-value. To set up the test, fill in the boxes: What null hypothesis H 0 about the mean μ do you want to test? Which alternative hypothesis H a do you have in mind, and what level of significance α do you require? What value of the standard deviation σ is known to be true? How many observations n will you have (250 or fewer)?
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