I am going to give away all my points bit by bit I have 287 points this is for the two lucky people who answer you get 50 points and if u answer first you get a brainleist. Good Luck and Enjoy.
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1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?