document.write( "Question 167876: Can somebody help me solve this question for Elementary stats class:\r
\n" ); document.write( "\n" ); document.write( "A final exam in math 160 has a mean of 73 with a standard deviation 7.8. If 24 students are randomly selected, find the probability that the mean of their test scores is less than 70.\r
\n" ); document.write( "\n" ); document.write( "How would you find the answer on the TI 83 graphing calculator. or is there another formula you could use to solve the question besides using the calculator.\r
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\n" ); document.write( "\n" ); document.write( "I'm not sure for what section my question belong to but feel free to move it to where it fits right. \n" ); document.write( "
Algebra.Com's Answer #123799 by Edwin McCravy(20056)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "On the TI83:\r\n" );
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document.write( "normalcdf(-E99,70,73,7.8/Ö(24))\r\n" );
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document.write( "Press ENTER.  Get .0297673515\r\n" );
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document.write( "That is a negative sign, not a minus sign. It's found on the key \r\n" );
document.write( "on the very bottom right. The sign is in parentheses like this (-)\r\n" );
document.write( "on the key.\r\n" );
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document.write( "To get \"normalcdf(\" press 2ND VARS 2.\r\n" );
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document.write( "To get the E, press 2ND then the comma key\r\n" );
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document.write( "To get \"Ö(\", press 2ND x2.\r\n" );
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document.write( "The comma has a key all by itself.\r\n" );
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document.write( "The \"/\" is just the division key, ÷\r\n" );
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document.write( "Edwin

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