Kuder-Richardson Formula 21 Calculator

Online statistics calculator which helps you in estimating test reliability from the given values.

Online statistics calculator which helps you in estimating test reliability from the given values.

Code to add this calci to your website

Just copy and paste the below code to your webpage where you want to display this calculator.

Formula:

Online statistics helps you in estimating the test reliability using Kuder-Richardson Formula 21 calculator.

Where, k - Number of questions μ - Population mean score σ² - Variance of the total scores of all the people ρKR21 - Reliability of the test