document.write( "Question 248577: What is the difference between z scores and area scores? What is each scores relationship to the graph of the standard normal distribution and what are the possible sign values for each score? \n" ); document.write( "

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What is the difference between z scores and area scores? What is each scores relationship to the graph of the standard normal distribution and what are the possible sign values for each score?
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\n" ); document.write( "The z-score of a data value is the distance measured in
\n" ); document.write( "standard deviations that data value is from the mean.
\n" ); document.write( "The z-value is negative if the distance is to the left
\n" ); document.write( "of the mean. The z-value is positive if the distance
\n" ); document.write( "is to the right of the mean.
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\n" ); document.write( "An area score is the percent of a population that
\n" ); document.write( "falls between a lower z-value and a higher z-value.
\n" ); document.write( "It is a measure of the normalized area above the z-
\n" ); document.write( "interval and below a normal curve. Area scores are
\n" ); document.write( "always positive.
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.\r
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