document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=195915>Question 195915</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/9780072966930/algebrahomeworkh></A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> Concerned about Friday absenteeism, management examined absenteeism rates for the last three Fridays in four assembly plants. Does this sample prove that there is a significant difference in treatment means? Absences<BR>\n" );
document.write( "Month	Plant 1	Plant 2	Plant 3	Plant 4<BR>\n" );
document.write( "4-Mar	19	18	27	22<BR>\n" );
document.write( "11-Mar	22	20	32	27<BR>\n" );
document.write( "18-Mar	20	16	28	26<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 #146898 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=146898\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Concerned about Friday absenteeism, management examined absenteeism rates for the last three Fridays in four assembly plants. Does this sample prove that there is a significant difference in treatment means? Absences<BR>\n" );
document.write( "Month	Plant 1	Plant 2	Plant 3	Plant 4<BR>\n" );
document.write( "4-Mar	19	18	27	22<BR>\n" );
document.write( "11-Mar	22	20	32	27<BR>\n" );
document.write( "18-Mar	20	16	28	26<BR>\n" );
document.write( "---------------------------------<BR>\n" );
document.write( "Ho: The means are the same for the 4 Plants<BR>\n" );
document.write( "H1: At least one of the means is different<BR>\n" );
document.write( "-------------<BR>\n" );
document.write( "I ran an ANOVA Test on the 4 columns of data and got the following:<BR>\n" );
document.write( "Test statistic: F = 14.18..<BR>\n" );
document.write( "p-value = 0.00144<BR>\n" );
document.write( "Conclusion:<BR>\n" );
document.write( "Since the p-value is less than 5%, reject Ho.<BR>\n" );
document.write( "At least one of the means is different.<BR>\n" );
document.write( "===============================================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );