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Normal probability distribution

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Reference no: EM131761700

Suppose that you take a sample of size 15 from a population that is normally distributed. Can the sampling distribution of  x¯ be approximated by a normal probability distribution?

Suppose that you are attempting to estimate the annual income of 1200 families. In order to use the infinite standard deviation formula, what sample size, n, should you use?

Reference no: EM131761700

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