document.write( "Question 1108924: 3. The IRS reports that the mean refund for a particular group of taxpayers was $1,600. The distribution of tax refunds follows a normal distribution with a standard deviation of $850.\r
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Algebra.Com's Answer #723925 by Boreal(15235)\"\" \"About 
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z=(x-mean)/sd
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\n" ); document.write( "That probability is 0.2389
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