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    Testing a Claim about Mean: Known Population SD01:11

    Testing a Claim about Mean: Known Population SD

    A complete procedure of testing the hypothesis about a population mean is explained here.
    Estimating a population mean requires the samples to be distributed normally. The data should be collected from the randomly selected samples having no sampling bias. The sample size needed to be higher than 30, and most importantly, the population standard deviation should be already known.
    In most realistic situations, the population standard deviation is often unknown, but in rare circumstances, when it...