Because it is not often used, save in intro stats courses, and is relatively simple to calculate, most stats software programs (StatCrunch included) do not have a special tool to help. Instead, you will need to manually recreate the formula using Excel or a calculator. To make the process easier, I have built an Excel calculator which makes typical intro stats problem quick and easy. This is a short video from my YouTube channel, The Stats Files, giving a quick review of Chebychev’s and showing how to use the Excel calculator: https://youtu.be/8rtb2gYjwzs
If you send an email to firstname.lastname@example.org telling me you have subscribed to my YouTube channel, I will send you a copy of the workbook.