How do I test a hypothesis using the critical value of t?

To test a hypothesis using the critical value of t, follow these four steps:

  1. Calculate the t value for your sample.
  2. Find the critical value of t in the t table.
  3. Determine if the (absolute) t value is greater than the critical value of t.
  4. Reject the null hypothesis if the sample’s t value is greater than the critical value of t. Otherwise, don’t reject the null hypothesis.