document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=795278>Question 795278</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A car rental has cars with an average of 9000 miles and standard deviation of 1200. If 25 cars are in a lot, what is the probability there average miles will be less than 9500 miles. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #480858 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=480858\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A car rental has cars with an average of 9000 miles and standard deviation of 1200. If 25 cars are in a lot, what is the probability there average miles will be less than 9500 miles.<BR>\n" );
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document.write( "t(9500) = (9500-9000)/(1200/sqrt(25)) = 500/240 = 2.0833<BR>\n" );
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document.write( "P(x-bar < 9500) = P(t < 2.0833) = tcdf(-100,2.0833,24) = 0.9760<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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