Use to evaluate the equivalence between a test mean and a reference mean when your samples are independent. You can also evaluate whether the test mean is greater than or less than the reference mean.

If the observations are dependent or paired, use Equivalence Test with Paired Data.

You created a new, less expensive  formulation of your popular cat food for discount retailers. You want to ensure that the protein content of the discount food is the same as that of your original food. You measure the amount of protein per 100 grams of food in both formulations and test whether they are equivalent within +/- 0.5 grams. You are not confident that the variances are equal, so you do not check Assume equal Variances in the Options subdialog box.

Data: CatFood.MTW (available in the Sample Data folder).