Tests of Differences between Means, Dependent Means (4 of 4)


Summary of Computations
  1. Compute a difference score for each subject.

  2. Test whether the mean difference score is significantly different from zero (click here for a summary of the computational steps for this test)

  1. Each subject is sampled independently from each other subject.

  2. The difference scores are normally distributed. (If both raw scores are normally distributed then the difference score will be normally distributed.) The two raw scores from each subject do not have to be independent of each other.