A Ret HC Cream (Hydroquinone 2% / Tretinoin 0.05% / Hydrocortisone 1% ) 15gm

You can calculate a P value in Microsoft Excel by using the T-Test function or the Data Analysis Tool. You can use Microsoft Excel 2010 for this procedure, and these steps are also the same for the newer versions. If you want to find a P value with Excel,...