why does the t test require the degrees of freedom and the z test does not

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why does the t test require the degrees of freedom and the ztest does not

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Let say You have a data set with 10 values If youre not estimating anything each value can take on any number right Each value is completely free to vary But suppose you want to test the population mean with a sample of 10 values using a 1sample t test You now have a constraintthe estimation of the mean What is See Answer

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why does the t test require the degrees of freedom and the z test does not

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why does the t test require the degrees of freedom and the ztest does not

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