Business, 23.03.2020 18:28, bullockarwen

According to the Internal Revenue Service, the mean tax refund for the year 2014 was $2,800. Assume the standard deviation is $450 and that the amounts refunded follow a normal probability distribution. What percent of the refunds are more than $3,100

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According to the Internal Revenue Service, the mean tax refund for the year 2014 was $2,800. Assume...