document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1206898>Question 1206898</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The scores on a psychology exam were normally distributed with a mean of 52 and a standard deviation of 9. About what percentage of scores were less than 43​? Use the​ 68-95-99.7 rule.<BR>\n" );
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document.write( "Solving in a much less formal manner than in the other responses....<br><BR>\n" );
document.write( "The 68-95-99.7 rule says that 68% of scores are within 1 standard deviation of the mean.<BR>\n" );
document.write( "43 is 1 standard deviation below the mean of 52, so half of 68% = 34% of scores are between 43 and the mean.<BR>\n" );
document.write( "That means 50%-34% = 16% of scores are below 43.<br><BR>\n" );
document.write( "ANSWER: 16%<br><BR>\n" );
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