document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=565281>Question 565281</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The length of time a customer must wait in line at the post office has approximately a normal distribution with a mean of 5.8 minutes and a standard deviation of 2.6 minutes.  Find the probability that a customer will wait between 4 and 8 minutes? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #365786 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=365786\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The length of time a customer must wait in line at the post office has approximately a normal distribution with a mean of 5.8 minutes and a standard deviation of 2.6 minutes. Find the probability that a customer will wait between 4 and 8 minutes?<BR>\n" );
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document.write( "z(4) = (4-5.8)/2.6 = -0.6923<BR>\n" );
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document.write( "z(8) = (8-5.8)/2.6 = 0.8462<BR>\n" );
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document.write( "P(4 < x < 8) = P(-0.6923 < z < 0.8462) = 0.7556<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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