document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=547250>Question 547250</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The number of hours per week statistics student spend on line is normally distributed with a mean of 10 hours and a standard deviation of 2 hours.  If 35 statistics student are selected at random, how many would you expect to say they spend more than 8 hours per week online ? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #356315 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=356315\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The number of hours per week statistics student spend on line is normally distributed with a mean of 10 hours and a standard deviation of 2 hours. If 35 statistics student are selected at random, how many would you expect to say they spend more than 8 hours per week online ?<BR>\n" );
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document.write( "z(8) = (8-10)/[2/sqrt(35)] = -5.91<BR>\n" );
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document.write( "P(x > 8) = P(z > -5.91) = normalcdf(-5.91,100) = 0.9999<BR>\n" );
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document.write( "Expected number = 0.9999*35 = 35<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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