document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1131482>Question 1131482</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In order to increase customer service, a muffler repair shop claims its mechanics can replace a<BR>\n" );
document.write( "muffler in less than 12 minutes. A time management specialist selected six repair jobs and found their<BR>\n" );
document.write( "mean time to be 11.6 minutes. The standard deviation of the sample was 2.1 minutes. At a 0.025 level of<BR>\n" );
document.write( "significance, is there enough evidence to support the shop’s claim? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #748914 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=748914\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Assuming normality, s unbiased estimator of sigma, random sample, etc.<BR>\n" );
document.write( "do 1 way<BR>\n" );
document.write( "test stat is a t <BR>\n" );
document.write( "critical value is t0.975, df=5, t<2.571<BR>\n" );
document.write( "calc is (x bar-mean)/s/sqrt (6)<BR>\n" );
document.write( "this is -0.4/2.1/sqrt(6) =-0.47<BR>\n" );
document.write( "fail to reject with insufficient evidence to support the claim at the 0.025 level<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );