document.write( "Question 623802: A distribution has a standard deviation of   12.
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\n" ); document.write( "c. Below the mean by 24 points.
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\n" ); document.write( "\n" ); document.write( "I understand that z= (data point- mean)/standard deviation.
\n" ); document.write( "What I got so far for a. is...
\n" ); document.write( " 100(because z-scores=100)= x-3/12
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Algebra.Com's Answer #392391 by ewatrrr(24785)\"\" \"About 
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document.write( "Hi,  
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document.write( "A distribution has a standard deviation of   12.
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document.write( " Find the z-score for each of the following locations in the distribution.
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document.write( "yes: z= (data point- mean)/standard deviation.
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document.write( " a. Above the mean by 3 points.  z =  3/12 = 1/4
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document.write( " b. Above the mean by 12 points. z = 12/12  = 1
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document.write( " c. Below the mean by 24 points. z = -24/12 = -2
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document.write( " d. Below the mean by 18 points. z = -18/12 = -3/2
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document.write( "Important to Understand z -values as they relate to the Standard Normal curve:
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document.write( "Below:  z = 0, z = ± 1, z= ±2 , z= ±3 are plotted.  
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document.write( "Note: z = 0 (x-value = the mean) 50% of the area under the curve is to the left and %50 to the right
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document.write( "For the normal distribution: 
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document.write( "one  standard deviation from the mean accounts for about 68.2% of the set 
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document.write( "two standard deviations from the mean account for about 95.5%
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document.write( "and three standard deviations from the mean account for about 99.7%.
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