Select the graph options for Power and Sample Size for 1-Sample Equivalence Test

Stat > Power and Sample Size > Equivalence Tests > 1-Sample > Graph

Display power curve

Plot the power of the test versus the difference, with a curve for each sample size. Use this plot to compare the effect of different sample sizes.

Generate additional power curves based on

Enter sample sizes that you did not include on the main dialog box to display on the power curve.