document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=757445>Question 757445</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I don't understand how to do these, I have researched all day. Please help.\r<BR>\n" );
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document.write( "Which is relatively better a score of 84 on a psychology test or a score of 47 on an economics test? Scores on the psychology test have a mean of 91 and a standard deviation of 10. Scores on the economics test have a mean of 51 and a standard deviation of 6.\r<BR>\n" );
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document.write( "A. The psychology test score is relatively better because its z score is less than the z score for the economics test score.<BR>\n" );
document.write( "B. The economics test score is relatively better because its z score is greater than the z score for the psychology test score.<BR>\n" );
document.write( "C. The psychology test score is relatively better because its z score is greater than the z score for the economics test score.  <BR>\n" );
document.write( "D. The economics test score is relatively better because its z score is less than the z score for the psychology test score. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #460804 by </B><A HREF=/tutors/aboutme.mpl?userid=John10><B>John10(297)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=John10><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=John10><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=460804\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Which is relatively better a score of 84 on a psychology test or a score of 47 on an economics test? Scores on the psychology test have a mean of 91 and a standard deviation of 10. Scores on the economics test have a mean of 51 and a standard deviation of 6.\r<BR>\n" );
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document.write( "A. The psychology test score is relatively better because its z score is less than the z score for the economics test score.<BR>\n" );
document.write( "B. The economics test score is relatively better because its z score is greater than the z score for the psychology test score.<BR>\n" );
document.write( "C. The psychology test score is relatively better because its z score is greater than the z score for the economics test score.  <BR>\n" );
document.write( "D. The economics test score is relatively better because its z score is less than the z score for the psychology test score.\r<BR>\n" );
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document.write( "For this problem, you need to find the z-score for EACH test to compare which one is better.\r<BR>\n" );
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document.write( "To find z, apply the formula z = (score - mean)/standard deviation.\r<BR>\n" );
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document.write( "I help you on the first z-score for psychology:\r<BR>\n" );
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document.write( "z = (84 - 91)/10 = -0.7\r<BR>\n" );
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document.write( "Then you can find the z-score for economy score. Then you compare them. The higher z-score means relatively better.\r<BR>\n" );
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document.write( "Good luck! John </SPAN>\n" );
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