document.write( "Question 132746: Find the value of z, such that P[ -z < Z < z ] = 0.5468\r
\n" ); document.write( "\n" ); document.write( "Last one I promise, appreciate all the help you guys have given me to prepare for my tests :) \n" ); document.write( "
Algebra.Com's Answer #97016 by stanbon(75887)\"\" \"About 
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Find the value of z, such that P[ -z < Z < z ] = 0.5468\r
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\n" ); document.write( "You need to understand this.
\n" ); document.write( "Draw the normal curve.
\n" ); document.write( "You are told the probability between -z and z is 0.5468
\n" ); document.write( "That interval will be centered on the mean. So there
\n" ); document.write( "will be an area under the curve of 0.2734 to the right
\n" ); document.write( "of the mean and an equal area to the left of the mean.
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\n" ); document.write( "If you use a z-chart look for 0.2734 in the body of the
\n" ); document.write( "chart; find the corresponding z-value listed on the left
\n" ); document.write( "side of the chart.
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\n" ); document.write( "If you use a TI calculator go to DISTR; select InvNorm;
\n" ); document.write( "enter 0.5+0.2734 or 0.5-0.2734 to get z= +0.75 or z=-0.75
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\n" ); document.write( "Those are the z-values you are looking for.
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\n" ); document.write( "If you can understand that procedure and can follow what
\n" ); document.write( "you are doing on your normal curve diagram you are
\n" ); document.write( "beginning to understand z-values.
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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