document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=123658>Question 123658</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0072868244/algebrahomeworkh>Statistical Techniques in Business and Economics, </A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> Please help me understand this problem I am having major difficulties understanding this!\r<BR>\n" );
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document.write( "Chapter 11: Two-Sample Tests of Hypothesis\r<BR>\n" );
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document.write( "17) Ms. Lisa Monnin is the budget director for Nexus Media, Inc. She would like to compare the daily travel expenses for the sales staff and the audit staff. She collected the following sample information.\r<BR>\n" );
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document.write( "Sales ($)  131   135   146   165    136   142<BR>\n" );
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document.write( "Audit ($)  130   102   129   143    149   120   139<BR>\n" );
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document.write( "At the .10 significance level, can she conclude that the mean daily expenses are greater for the sales staff than the audit staff? What is the p-value?\r<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 #90867 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=90867\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Ms. Lisa Monnin is the budget director for Nexus Media, Inc. She would like to compare the daily travel expenses for the sales staff and the audit staff. She collected the following sample information. <BR>\n" );
document.write( "Sales ($) 131 135 146 165 136 142\r<BR>\n" );
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document.write( "Audit ($) 130 102 129 143 149 120 139\r<BR>\n" );
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document.write( "At the .10 significance level, can she conclude that the mean daily expenses are greater for the sales staff than the audit staff? What is the p-value?<BR>\n" );
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document.write( "These are independent data sets.  Use a 2-sample t test.<BR>\n" );
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document.write( "Ho: mu(sales)-mu(audit) =0<BR>\n" );
document.write( "Ha: mu(sales)-mu(audit) >0<BR>\n" );
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document.write( "t(142.5-130.285) = 1.569177<BR>\n" );
document.write( "p-value = 0.07255..<BR>\n" );
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document.write( "Conclusion: Since p-value < alpha=0.10, reject Ho.<BR>\n" );
document.write( "There is significant statistical evidence that the <BR>\n" );
document.write( "mean daily expenses are greater for the sales staff <BR>\n" );
document.write( "than the audit staff.<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. <BR>\n" );
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