document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=445831>Question 445831</A>: <I><SPAN STYLE=\"word-break: break-all;\"> IQ scores in a general adult population have mean 100 and standard deviation 15. A simple random sample of 50 adults is selected, and the sample mean x  of their IQ scores is computed.<BR>\n" );
document.write( "What is the probability that the sample mean IQ score is greater than 105.0? Give your answer as a number between 0 and 1, rounded to 3 decimal places. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #306999 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=306999\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> IQ scores in a general adult population have mean 100 and standard deviation 15. A simple random sample of 50 adults is selected, and the sample mean x of their IQ scores is computed.<BR>\n" );
document.write( "What is the probability that the sample mean IQ score is greater than 105.0? Give your answer as a number between 0 and 1, rounded to 3 decimal places.<BR>\n" );
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document.write( "z(105) = (105-100)/15 = 1/3<BR>\n" );
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document.write( "P(x > 105) = P(z > 1/3) = normalcdf(1/3,100) = 0.369<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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