Education Technology

Meaning of P-Value

Published on 10/01/2010

Activity Overview

  • Students will recognize that a p-value only has meaning if the null hypothesis is true (a conditional probability).
  • Students will interpret a p-value in given contexts as the relative frequency for sample statistical values at least as extreme as that from the observed sample, assuming that the null hypothesis is true.
  • Students will recognize the relationship between sample size and p-values: in general, for sample means giving p-values less than 0.5, increasing the sample size decreases the p-value.

Key Steps

  • Image

    Students begin by looking at a population with a mean of 10, which is assumed in the null hypothesis. They will use an animation to draw various sizes of samples from the population.