Sample means vs variables in sample
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Is it a must that the population sample has to be normally distributed to work with student T dist?
If we know stdev from the sample and they're different, how do we assume variances are equal?
Resolved: why do you need to divide standard deviation of sampling means by sqrt of sample size?
Resolved: Why is the formula for sample variation has n-1 in denominator instead of n?
Why a sample comprising (exclusively) silicon valley start-ups can be considered a random sample.