document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=187146>Question 187146</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I NEED HELP. PLEASE HELP ME SOLVE THIS. THANK YOU SO MUCH\r<BR>\n" );
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document.write( "9.54 Faced with rising fax costs, a firm issued a guideline that transmissions of 10 pages or more should be sent by 2-day mail instead. Exceptions are allowed, but they want the average to be 10 or below. The firm examined 75 randomly chosen fax transmissions during the next year, yielding a sample mean of 11.44 with a standard deviation of 2.15 pages. At the .05 level of significance, is the true mean greater than 10? Explain your decision.<BR>\n" );
document.write( "Clearly state your decision on the null hypothesis. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #140401 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=140401\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 9.54 Faced with rising fax costs, a firm issued a guideline that transmissions of 10 pages or more should be sent by 2-day mail instead. Exceptions are allowed, but they want the average to be 10 or below. The firm examined 75 randomly chosen fax transmissions during the next year, yielding a sample mean of 11.44 with a standard deviation of 2.15 pages. At the .05 level of significance, is the true mean greater than 10? Explain your decision.<BR>\n" );
document.write( "Clearly state your decision on the null hypothesis.<BR>\n" );
document.write( "Ho: u <= 10<BR>\n" );
document.write( "Ha: u > 10<BR>\n" );
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document.write( "test statistics: t(11.44) = (11.44-10)/[2.15/sqrt(75)] = 5.80<BR>\n" );
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document.write( "p-value = P(t > 5.80) = 0.0000000766<BR>\n" );
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document.write( "Since the p-value is less than 5%, reject Ho.<BR>\n" );
document.write( "The true mean is greater than 10.<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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