According to the irs the average tax refund for the 70

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Reference no: EM13621897

According to the IRS, the average tax refund for the 70 million personal income tax returns in 1998 was $800. Assuming a standard deviation of $220, find the probability that for a random sample of 49 returns, the mean refund is between $700 and $900.

Reference no: EM13621897

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