document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=787888>Question 787888</A>: <I><SPAN STYLE=\"word-break: break-all;\"> An electrical company takes 120 hours with a standard deviation of 25 hours to wire a build complex. What is probability that the same company will take at least 115 hours to do the same job? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #478350 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=478350\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> An electrical company takes 120 hours with a standard deviation of 25 hours to wire a build complex. What is probability that the same company will take at least 115 hours to do the same job?<BR>\n" );
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document.write( "z(115) = (115-120)/25 = -1/5<BR>\n" );
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document.write( "P(x >= 115) = P(z >= -1/5) = 0.5793<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "============= </SPAN>\n" );
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