document.write( "Question 866773: please help me solve this problem.\r
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document.write( "The combined math verbal scores for students taking a national standardized examination for college, is normally distributed with a mean of 530 and a standard deviation of 180. If a college requires a minimum of 1000 for admission, what percentage of student do not satisfy that requirement? \n" );
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Algebra.Com's Answer #522474 by Theo(13342)![]() ![]() You can put this solution on YOUR website! mean is 530 \n" ); document.write( "standard deviation is 180 \n" ); document.write( "z-score for this test is: \n" ); document.write( "z = (1000 - 530) / 180 \n" ); document.write( "you get: \n" ); document.write( "z = 2.611111 \n" ); document.write( "round this off to 2.61 because the z-score tables only go to 2 decimal places. \n" ); document.write( "look that z-score up in the z-score table and you will see that the area to the left of that z-score in the table is equal to .9955. this means that 99.55% of the students would not be able to pass the minimum requirements for admission to that school. \n" ); document.write( "the z-score table is can be found at the following link: \n" ); document.write( "http://lilt.ilstu.edu/dasacke/eco148/ztable.htm \n" ); document.write( "scroll down the left column until you reach 2.6. \n" ); document.write( "scroll to the right on that row until you reach the column with the heading of .01. \n" ); document.write( "the number shown should be equal to .9955 \n" ); document.write( "that number is in the second column to the right of the first column. \n" ); document.write( "in this particular table, the number shown is the area to the left of the indicated z-score. \n" ); document.write( "multiply that number by 100 and that number is telling you the percent of the population that has a z-score less than the indicated z-score. \n" ); document.write( "a z-score less than 2.61 means a raw score less than 1000 in this problem.\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |