document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=819871>Question 819871</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Suppose commuting times to work are normally distributed with mean 25 minutes and standard deviation 6.1 minutes. Find the probability that a randomly selected spends more than 20 minutes commuting.<BR>\n" );
document.write( "A).8190<BR>\n" );
document.write( "B).6808<BR>\n" );
document.write( "C).1230<BR>\n" );
document.write( "D).2440 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #493329 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=493329\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Suppose commuting times to work are normally distributed with mean 25 minutes and standard deviation 6.1 minutes. Find the probability that a randomly selected spends more than 20 minutes commuting.<BR>\n" );
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document.write( "z(20) = (20-25)/6.1 = -0.8197<BR>\n" );
document.write( "P(x > 20) = P(z > -0.8197) = normalcdf(-0.8197,100) = 0.7938<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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