document.write( "Question 202384: A standarduzes test has a mean score of 100 and a standard deviation of 15.\r
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document.write( "a. what percentage of people score between 70 and 85 ?
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document.write( "b. what percentage of people score between 100 and 115? \n" );
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Algebra.Com's Answer #152611 by Theo(13342)![]() ![]() You can put this solution on YOUR website! to answer this question, it helps to have a graphing calculator, or to have an online calculator. \n" ); document.write( "the online calculator I used is at this web address. \n" ); document.write( "----- \n" ); document.write( "http://davidmlane.com/hyperstat/z_table.html \n" ); document.write( "----- \n" ); document.write( "for this problem, the upper half of the calculator is used. \n" ); document.write( "enter the mean (100) and enter the sd (15). \n" ); document.write( "click on between and enter the values you want. \n" ); document.write( "first value is between 70 and 85. \n" ); document.write( "answer is 13.5905% which the calculator shows you. \n" ); document.write( "second value is between 100 and 115. \n" ); document.write( "answer is 34.1345% which the calculator shows you.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |