document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1056589>Question 1056589</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A golf instructor is interested in determining if her new technique for improving players’ golf scores is effective. She<BR>\n" );
document.write( "takes four new students. She records their 18-hole scores before learning the technique and then after having taken her class.<BR>\n" );
document.write( "She conducts a hypothesis test. The data are as follows.<BR>\n" );
document.write( "Player 1 Player 2 Player 3 Player 4<BR>\n" );
document.write( "Mean score before class 83 78 93 87<BR>\n" );
document.write( "Mean score after class 80 80 86 86<BR>\n" );
document.write( "Table 10.31<BR>\n" );
document.write( "The correct decision is:<BR>\n" );
document.write( "a. Reject H0.<BR>\n" );
document.write( "b. Do not reject the H0. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #671693 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=671693\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Do not reject Ho<BR>\n" );
document.write( "mean of the first is 85.25, and mean of second is 83<BR>\n" );
document.write( "sd 1 is 6.34<BR>\n" );
document.write( "sd 2 is 3.46<BR>\n" );
document.write( "the two sample t is (mean1-mean2)/sqrt((s1^2/n1)+(s2^2/n2))<BR>\n" );
document.write( "The df=6<BR>\n" );
document.write( "n1 and n2 are 4 each<BR>\n" );
document.write( "The critical value is 2.45 for t0.975, df=6<BR>\n" );
document.write( "t=0.622, which does not exceed the critical value. (This is not surprising, given that the means are very similar and there are only 4 observations in each group). </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );