Try the following self-assessment questions. When you have decided on your answer, mouse over the answer button to check:

 

1. For each of the following features, say whether it applies to a t test.

  • Parametric test. The answer is yes
  • Numbers plugged into the formula for the statistic are frequencies . The answer is no
  • Numbers plugged into the formula for the statistic are based on the differences between related data in two samples. The answer is yes
  • Used for assessing the differences betwen more than two samples. The answer is no
  • Used on unrelated data. The answer is no
  • Reject the null hypothesis if the calculated statistic is less than or equal to the critical value of the statistic from the table.  The answer is no
  • Reject the null hypothesis if P on the SPSS printout is less than 0.05.  The answer is yes