document.write( "Question 742439: Can someone let me know which formulas to use for these problems please? I have all the answers, but I want to understand how to work the problems for myself. I am studying for a final in 5 days and would really appreciate if anyone could help me out. Thanks in advance.\r
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\n" ); document.write( "\n" ); document.write( "A department store, on average, has daily sales of $29,539.06. The standard deviation of sales is $2,000. On Tuesday, the store sold $34,574.94 worth of goods. Find Tuesday's z score. Was Tuesday an unusually good day?\r
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Algebra.Com's Answer #452551 by Edwin McCravy(20055) $\"\"$ $\"About$

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A department store, on average, has daily sales of $29,539.06. The standard deviation of sales is $2,000. On Tuesday, the store sold $34,574.94 worth of goods. Find Tuesday's z score. Was Tuesday an unusually good day?
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document.write( " = 2.52\r\n" );
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document.write( "That means that Tuesday's sales were 2.52 standard deviations above the\r\n" );
document.write( "mean and by the empirical rule 95% of the sales are no more than 2\r\n" );
document.write( "standard deviations above the mean, so indeed Tuesday's sales were\r\n" );
document.write( "unually good.\r\n" );
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document.write( "Edwin

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