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According to the IRS, 2012 tax returns showed an average refund of $2137 with a standard deviation of 1677. Assume that 2012 tax returns are
According to the IRS, 2012 tax returns showed an average refund of $2137 with a standard deviation of 1677. Assume that 2012 tax returns are normally distributed.
find the probability a randomly selected 2012 tax return showed an amount less than or equal to $4426 or greater than $5211. It can be used in an excel worksheet I am not sure how to put it in correctly
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