document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=455996>Question 455996</A>: <I><SPAN STYLE=\"word-break: break-all;\"> At Oxnard University, a sample of 25 senior accounting majors showed a mean cumulative GPA of 3.25 with a standard deviation of 0.15. At &#945; = .05 in a two-tailed test, does this differ significantly from 3.20 (the mean GPA for all business school seniors at the university)?<BR>\n" );
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document.write( "what steps or distribution should I use in Megastat, please? I don't feel like I am completing this correctly. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #313013 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=313013\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> At Oxnard University, a sample of 25 senior accounting majors showed a mean cumulative GPA of 3.25 with a standard deviation of 0.15. <BR>\n" );
document.write( "At &#945; = .05 in a two-tailed test, does this differ significantly from 3.20 (the mean GPA for all business school seniors at the university)?<BR>\n" );
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document.write( "Ho: u(all) - u(ox) = 0<BR>\n" );
document.write( "Ha: u(all) - u(ox) is not 0<BR>\n" );
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document.write( "test stat: t(3.25) = (3.25-3.2)/[0.15/25] = 1.6667<BR>\n" );
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document.write( "p-value = 2*P(t > 1.667 when df = 24) = 2*tcdf(1.667,100,24) = 0.1085<BR>\n" );
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document.write( "Conclusion: Since the p-value is greater than 5%, fail to reject Ho.<BR>\n" );
document.write( "The test results support the equality of the mean values at the<BR>\n" );
document.write( "5% level of significance.<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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