document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=198568>Question 198568</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Blockbuster is testing a new policy of waiving all late fees on DVD rentals using a sample of 10 randomly chosen customers. (a) At a-.10, does the data show that the man number of monthly rentals has increased? (b) Is the decision close? (c) Are you convinced?\r<BR>\n" );
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document.write( "Customer   No Late Fee                    Late Fee<BR>\n" );
document.write( " 1                      14                  10<BR>\n" );
document.write( " 2                      12                    7<BR>\n" );
document.write( " 3                      14                  10<BR>\n" );
document.write( " 4                       13                 13<BR>\n" );
document.write( " 5                       10                  9<BR>\n" );
document.write( " 6                       13                 14<BR>\n" );
document.write( " 7                       12                 12<BR>\n" );
document.write( " 8                       10                   7 <BR>\n" );
document.write( " 9                       13                  13 <BR>\n" );
document.write( "10                      13                   9\r<BR>\n" );
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document.write( "I can figure out the mean which is 12.4 of no late fee but cannot figure out the rest, can someone please help. Thanks<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 #149096 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=149096\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Blockbuster is testing a new policy of waiving all late fees on DVD rentals using a sample of 10 randomly chosen customers. (a) At a-.10, does the data show that the man number of monthly rentals has increased? (b) Is the decision close? (c) Are you convinced? <BR>\n" );
document.write( "Customer No Late Fee Late Fee<BR>\n" );
document.write( "1 14 10<BR>\n" );
document.write( "2 12 7<BR>\n" );
document.write( "3 14 10<BR>\n" );
document.write( "4 13 13<BR>\n" );
document.write( "5 10 9<BR>\n" );
document.write( "6 13 14<BR>\n" );
document.write( "7 12 12<BR>\n" );
document.write( "8 10 7 <BR>\n" );
document.write( "9 13 13 <BR>\n" );
document.write( "10 13 9 <BR>\n" );
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document.write( "These data are dependent pairs because each pair measures a \"before\"<BR>\n" );
document.write( "and \"after\" for the same person.<BR>\n" );
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document.write( "Make a list for each data set.  <BR>\n" );
document.write( "Make a list of the difference (no late fee)-(late fee)<BR>\n" );
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document.write( "Run a t-test on the difference of the 10 pairs.<BR>\n" );
document.write( "mean of the difference = 2<BR>\n" );
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document.write( "Ho: u(difference) = 0<BR>\n" );
document.write( "H1: u(difference) > 0<BR>\n" );
document.write( "Decision Rule: Reject Ho if the test statistic is greater than 1.383..<BR>\n" );
document.write( "test statistic: t = 2.8604<BR>\n" );
document.write( "p-value: 0.0094<BR>\n" );
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document.write( "Conclusion: Since the p-value is less than 10%, reject Ho.<BR>\n" );
document.write( "The test provides evidence that the mean of the differences<BR>\n" );
document.write( "is not zero.<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.\r<BR>\n" );
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