document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1058427>Question 1058427</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A study of the amount of time it takes a mechanic to rebuild the transmission for a 2005 Chevy Cavalier shows that the mean is 8.4 hours and the standard deviation is 1.8 hrs, If 40 mechanics are randomly selected, find the probability that their mean rebuild time is less than 7.6 hrs. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #673800 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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/cgi-bin/show-face.mpl?user=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=673800\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> t=(x-mean)/s/sqrt(n); <BR>\n" );
document.write( "t=(7.6-8.4)*6.32/1.8=--2.81<BR>\n" );
document.write( "p=0.0076 for t with 39 df. </SPAN>\n" );
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