document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1163179>Question 1163179</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A study was made by a retail merchant to determine the relation between weekly advertising expenditure and sales. The following data were recorded:-\r<BR>\n" );
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document.write( "Advertising Costs\r<BR>\n" );
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document.write( "Sales\r<BR>\n" );
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document.write( "40\r<BR>\n" );
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document.write( "20\r<BR>\n" );
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document.write( "25\r<BR>\n" );
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document.write( "20\r<BR>\n" );
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document.write( "30\r<BR>\n" );
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document.write( "50\r<BR>\n" );
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document.write( "40\r<BR>\n" );
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document.write( "20\r<BR>\n" );
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document.write( "50\r<BR>\n" );
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document.write( "40\r<BR>\n" );
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document.write( "25\r<BR>\n" );
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document.write( "50\r<BR>\n" );
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document.write( "385\r<BR>\n" );
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document.write( "400\r<BR>\n" );
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document.write( "395\r<BR>\n" );
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document.write( "365\r<BR>\n" );
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document.write( "475\r<BR>\n" );
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document.write( "440\r<BR>\n" );
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document.write( "490\r<BR>\n" );
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document.write( "420\r<BR>\n" );
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document.write( "560\r<BR>\n" );
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document.write( "525\r<BR>\n" );
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document.write( "480\r<BR>\n" );
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document.write( "510\r<BR>\n" );
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document.write( "Find the equation of the regression line to predict weekly sales from advertising expenditure.<BR>\n" );
document.write( "Interpret regression co-efficient and y-intercept<BR>\n" );
document.write( "Can we take advertising costs as dependent variable if yes then how if not then why?<BR>\n" );
document.write( "Could this question be studied using correlation, if yes then how if not then why<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 #787248 by </B><A HREF=/tutors/aboutme.mpl?userid=ikleyn><B>ikleyn(52915)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ikleyn><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/cgi-bin/show-face.mpl?user=ikleyn><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=787248\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .\r<BR>\n" );
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document.write( "From the context, &nbsp;the input data should be two-column table,\r<BR>\n" );
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document.write( "but I see only one column.\r<BR>\n" );
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document.write( "With such data presentation, the problem can not be solved, &nbsp;and &nbsp;NEITHER &nbsp;question &nbsp;\"how\" &nbsp;NOR &nbsp;\"why\" &nbsp;can be answered.\r<BR>\n" );
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document.write( "If you are going to fix your data and to re-post to this forum, &nbsp;then &nbsp;PLEASE &nbsp;do not post it to me personally.\r<BR>\n" );
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