document.write( "Question 476515: what is the area under the curve between z=1.50 and z=2.50? \n" ); document.write( "
Algebra.Com's Answer #326760 by Edwin McCravy(20060)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "There are two kinds of normal z-tables around these days. The\r\n" );
document.write( "most common type gives areas from the middle z=0 to the right \r\n" );
document.write( "and others give the area from the extreme left to the right.\r\n" );
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document.write( "I will assume first that you have the first type, that reads \r\n" );
document.write( "from z=0 to the right.  I'll explain below what to do if you\r\n" );
document.write( "have the other type as well as how to find it on a TI-83 or \r\n" );
document.write( "TI-84 graphing calculator.  \r\n" );
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document.write( " =  — \r\n" );
document.write( "AREA BETWEEN z=1.5 & z=2.5 = AREA BETWEEN z=0 & z=2.5  —  AREA BETWEEN z=0 & z=1.5 \r\n" );
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document.write( "If you have a table which gives the area between \r\n" );
document.write( "z=0 and z=\"whatever\",\r\n" );
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document.write( "AREA BETWEEN z=0 and z=2.50 is given in the table as .4938\r\n" );
document.write( "AREA BETWEEN z=0 and z=1.50 is given in the table as .4332\r\n" );
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document.write( "therefore:\r\n" );
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document.write( "AREA BETWEEN z=1.5 & z=2.5 = .4938 — .4332 = .0606\r\n" );
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document.write( "If you have the other kind of table those values will \r\n" );
document.write( "be .9938-.9332=.0606, the same answer.\r\n" );
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document.write( "If you have a TI-83 or TI-84 calculator and your teacher will\r\n" );
document.write( "let you use it,\r\n" );
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document.write( "From the cleared main screen\r\n" );
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document.write( "Press 2ND\r\n" );
document.write( "Press VARS\r\n" );
document.write( "Press 3\r\n" );
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document.write( "you will see this on the screen -->  invNorm(\r\n" );
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document.write( "after that type 1.5,2.5) so that you see this on the\r\n" );
document.write( "screen --->  invNorm(1.5,2.5)\r\n" );
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document.write( "[If you can't find the comma key it is the key just to\r\n" );
document.write( "the right of the x2 key].\r\n" );
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document.write( "Press ENTER\r\n" );
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document.write( "You will see .0605975489, which rounds to the value .0606\r\n" );
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document.write( "Edwin
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