document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=236507>Question 236507</A>: <I><SPAN STYLE=\"word-break: break-all;\">  You are given the following data. Test the claim that there is a difference in the means of the two groups. Use  = 0.01. <BR>\n" );
document.write( "Group A           Group B<BR>\n" );
document.write( " x1= 7             x2 = 10<BR>\n" );
document.write( " s1= 12            s2 = 11<BR>\n" );
document.write( " n1= 66            n1 = 92<BR>\n" );
document.write( "·         State the null and alternate hypotheses<BR>\n" );
document.write( "·         Determine which test statistic applies, and calculate it<BR>\n" );
document.write( "·         Determine the critical value(s).<BR>\n" );
document.write( "·         State your decision: Should the null hypothesis be rejected? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #174140 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=174140\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> You are given the following data. Test the claim that there is a difference in the means of the two groups. Use = 0.01. <BR>\n" );
document.write( "Group A Group B<BR>\n" );
document.write( "x1= 7 x2 = 10<BR>\n" );
document.write( "s1= 12 s2 = 11<BR>\n" );
document.write( "n1= 66 n1 = 92<BR>\n" );
document.write( "----<BR>\n" );
document.write( "Comment: The data seems to imply you are going to test a <BR>\n" );
document.write( "difference of proportions.  But your problem asks you<BR>\n" );
document.write( "to test a difference of means.<BR>\n" );
document.write( "To do that you would need to be able to calculate<BR>\n" );
document.write( "two sample means.  The data is not there for testing<BR>\n" );
document.write( "the difference of means.\r<BR>\n" );
document.write( "\n" );
document.write( "--------------------------------<BR>\n" );
document.write( "---\r<BR>\n" );
document.write( "\n" );
document.write( "· State the null and alternate hypotheses<BR>\n" );
document.write( "Ho: u1-u2 = 2<BR>\n" );
document.write( "H1: u1-u2 is not zero<BR>\n" );
document.write( "-------------------------------------<BR>\n" );
document.write( "· Determine which test statistic applies, and calculate it<BR>\n" );
document.write( "· Determine the critical value(s).<BR>\n" );
document.write( "· State your decision: Should the null hypothesis be rejected?<BR>\n" );
document.write( "==============================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );