Sample size for large population
What is the minimum sample size to explore the population of a city?
Does Z score then apply since the size might be larger than 50?
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If we know stdev from the sample and they're different, how do we assume variances are equal?
Is it a must that the population sample has to be normally distributed to work with student T dist?
Resolved: why do you need to divide standard deviation of sampling means by sqrt of sample size?