Kuder-Richardson Formula 21 Calculator

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

Kuder-Richardson Formula 21 Calculation For Test Reliability

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

kuder richardson21 Where, k - Number of questions μ - Population mean score σ2 - Variance of the total scores of all the people ρKR21 - Reliability of the test

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