document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=358361>Question 358361</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How do I solve this problem?\r<BR>\n" );
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document.write( "Suppose that the time required to complete a 1040R tax form is normally distributed with a mean of 90 minutes and a standard deviation of 20 minutes. What proportion of 1040R tax forms will be completed in at least 119 minutes: Round your answer to at least four 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 #255813 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=255813\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Suppose that the time required to complete a 1040R tax form is normally distributed with a mean of 90 minutes and a standard deviation of 20 minutes. What proportion of 1040R tax forms will be completed in at least 119 minutes: Round your answer to at least four decimal places. <BR>\n" );
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document.write( "z(119) = (119-90)/20 = 1.45<BR>\n" );
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document.write( "P(x>= 119) = P(z>= 1.45) = normalcdf(1.45,100,) = 0.0735<BR>\n" );
document.write( "Proportion: 7.35/100\r<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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