document.write( "Question 347435: If the mean height is 70 inches with a standard deviation of 4, how many people would need to be sampled to find 5 people with height of 86 inches? \n" ); document.write( "
Algebra.Com's Answer #248616 by scott8148(6628)\"\" \"About 
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86 inches is 4 standard deviations (σ) above the mean\r
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\n" ); document.write( "\n" ); document.write( "99.993666% (approx) of a normally distributed population lies within 4σ of the mean\r
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\n" ); document.write( "\n" ); document.write( "out of a million people , about 63 would be outside 4σ ___ above AND below\r
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\n" ); document.write( "\n" ); document.write( "so about 32 out of a million are at least 86 inches tall\r
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