document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=138949>Question 138949</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In Dallas, some fire trucks were painted yellow (instead of red) to heighten their visibility. During a test period, the fleet of red fire trucks made 153,348 runs and had 20 accidents, while the fleet of yellow fire trucks made 135,035 runs and had 4 accidents. At &#945; = .01, did the yellow fire trucks have a significantly lower accident rate? (a) State the hypotheses. (b) State the decision rule and sketch it. (c) Find the sample proportions and z test statistic. (d) Make a decision. (e) Find the p-value and interpret it. (f ) If statistically significant, do you think the difference is large enough to be important? If so, to whom, and why? (g) Is the normality assumption fulfilled? Explain.<BR>\n" );
document.write( "Accident Rate for Dallas Fire Trucks<BR>\n" );
document.write( "Statistic Red Fire Trucks Yellow Fire Trucks<BR>\n" );
document.write( "Number of accidents x1 = 20 accidents x2 = 4 accidents<BR>\n" );
document.write( "Number of fire runs n1 = 153,348 runs n2 = 135,035 runs<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #101358 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=101358\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Your problems have been previously aswered.<BR>\n" );
document.write( "Go to www.algebra.com<BR>\n" );
document.write( "Use the search bar to find 138528<BR>\n" );
document.write( "===============<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );