The process of downloading DDSolver.XLA is straightforward, but it's crucial to ensure you're obtaining the add-in from a reputable source to avoid any potential security risks. Here’s how to do it safely:

After installation, test DDSolver:

This citation respects the developers’ work and helps other researchers discover the tool.

After installation, open Excel, go to the "File" menu, select "Options," and then click on "Add-ins." Manage the add-ins and ensure DDSolver.XLA is listed and enabled.

Output: f2 = 68.4 → Interpretation: Similar (FDA requires f2 ≥ 50 for similarity).