document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=273221>Question 273221</A>: <I><SPAN STYLE=\"word-break: break-all;\"> At a certain university, the average cost of books per student was $330 per student last semester. In a sample of 50 students this semester, their average cost was $355 with a standard deviation of $85. The Dean of Students believes that the costs are greater this semester. What is the test value for this hypothesis? <BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #199627 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=199627\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> At a certain university, the average cost of books per student was $330 per student last semester. <BR>\n" );
document.write( "In a sample of 50 students this semester, their average cost was $355 with a standard deviation of $85. <BR>\n" );
document.write( "The Dean of Students believes that the costs are greater this semester. What is the test value for this hypothesis?<BR>\n" );
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document.write( "test stat<BR>\n" );
document.write( "t(355) = (355-330)/[85/sqrt(50)] = 2.0797..<BR>\n" );
document.write( "=============<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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