document.write( "Question 1161980: The average grade of a subject is 1.89 for the whole class, with a standard deviation of 0.63. If a sample is 25 students is being taken, then find the probability of getting the average of this sample to be within the range of 1.6 and 2.0. \n" ); document.write( "
Algebra.Com's Answer #785719 by Edwin McCravy(20056)\"\" \"About 
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document.write( "On your TI-84,\r\n" );
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document.write( "press 2nd vars 2\r\n" );
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document.write( "lower:1.6             \r\n" );
document.write( "upper:2.0\r\n" );
document.write( "μ:1.89\r\n" );
document.write( "σ:0.63/√(25)         <--for √( press 2nd then x² \r\n" );
document.write( "Paste                 <--scroll down with down arrow key to highlight Paste\r\n" );
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document.write( "press enter\r\n" );
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document.write( "normalcdf(1.6,2.0,1.89,0.63/√(25)\r\n" );
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document.write( "press enter\r\n" );
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document.write( "0.7979936308          <--answer\r\n" );
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document.write( "Edwin
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