document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=508452>Question 508452</A>: <I><SPAN STYLE=\"word-break: break-all;\"> assume the scores on an achievent test taken by fifth graders are normally distributed with M=57 an Sd=7.5.<BR>\n" );
document.write( "a. what % of student scored above the mean/<BR>\n" );
document.write( "b.above what raw score do 5% of scores fall?<BR>\n" );
document.write( "c. what % of students scored below a score of 50?<BR>\n" );
document.write( "d. between what 2 raw scores do the middle 50% of these scores fall.\r<BR>\n" );
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document.write( " need to undersatnd the correct way to solve these types of problems.<BR>\n" );
document.write( "green_m1@yahoo.com </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #340998 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=340998\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> assume the scores on an achievent test taken by fifth graders are normally distributed with M=57 an Sd=7.5.<BR>\n" );
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document.write( "a. what % of student scored above the mean:: you always have 50% above the mean.<BR>\n" );
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document.write( "b. above what raw score do 5% of scores fall?<BR>\n" );
document.write( "Assuming you mean the top 5%:<BR>\n" );
document.write( "invNorm(0.95) = 1.645<BR>\n" );
document.write( "score = 1.756*7.5+57 = 69.34<BR>\n" );
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document.write( "c. what % of students scored below a score of 50?<BR>\n" );
document.write( "z(50) = (50-57)/7.5 = -7/7.5 = -0.9333<BR>\n" );
document.write( "P(x < 50 = P(z < -0.9333) = normalcdf(-100,-0.9333) = 0.1753<BR>\n" );
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document.write( "d. between what 2 raw scores do the middle 50% of these scores fall.<BR>\n" );
document.write( "Lower limit has a left tail of 25%<BR>\n" );
document.write( "The corresponding z-value is invnorm(0.25) = -0.6745<BR>\n" );
document.write( "Lower limit score = -0.6745*7.5+57 = 51.94<BR>\n" );
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document.write( "Upper limit has a right tail of 25%<BR>\n" );
document.write( "Upper limit score = +0.6745*7.5+57 = 62.06<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. <BR>\n" );
document.write( "need to undersatnd the correct way to solve these types of problems.<BR>\n" );
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