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    Testing a Claim about Standard Deviation01:19

    Testing a Claim about Standard Deviation

    A complete procedure to test a claim about population standard deviation or population variance is explained here.
    The hypothesis testing for the claim of population standard deviation (or variance) requires the data and samples to be random and unbiased. The population distribution also must be normal. There is no specific requirement on the sample size as the estimation is based on the chi-square distribution.
    As a first step, the hypothesis (null and alternative) concerning the claim about...