Learn By Doing – Using p-values

Published: March 8th, 2013

Category: Activity 1: Learn By Doing

The following two hypotheses are tested:

  • Ho: The proportion of U.S. adults who oppose gay marriage is roughly 50%.
  • Ha: The proportion of U.S. adults who oppose gay marriage is above 50% (i.e., the majority oppose).

Suppose a survey was conducted in which a random sample of 1,100 U.S. adults was asked about their opinions about gay marriage, and based on the data, the p-value was found to be 0.002.

Comment: Throughout this activity use a 0.05 (5%) significance level (cutoff).

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This document is linked from Steps in Hypothesis Testing.