document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1051015>Question 1051015</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help me understand this problem:\r<BR>\n" );
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document.write( "For the X,Y data below, compute:\r<BR>\n" );
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document.write( "a. r and determine if it is significantly different from zero.\r<BR>\n" );
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document.write( "b. the slope of the regression line and test if it differs significantly from zero.\r<BR>\n" );
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document.write( "c. the 95% confidence interval for the slope.\r<BR>\n" );
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document.write( "I'm lost.<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 #666624 by </B><A HREF=/tutors/aboutme.mpl?userid=ewatrrr><B>ewatrrr(24785)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ewatrrr><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=ewatrrr><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=666624\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Please REpost with Data Clearly showing x and y values<BR>\n" );
document.write( "For ex:<BR>\n" );
document.write( "I. Generally, using data given and an Excel spreadsheet:  a Scatter Plot/ showing trend line and R^2 is done<BR>\n" );
document.write( "Here R is  significantly different from zero as well as is the slope of the trend line, m = 2.57<BR>\n" );
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document.write( "c. the 95% confidence interval for the slope. <BR>\n" );
document.write( "•Compute margin of error (ME): ME = critical value * standard error <BR>\n" );
document.write( "Use Calculator or Excel to find the critical value(generally 1.96 for 95% confidence interval of a very large sample size)<BR>\n" );
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document.write( "standard error can be found using Data and in Excel: STEYX function<BR>\n" );
document.write( "In this example, SE = 4.7<BR>\n" );
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document.write( "In this ex: n = 10 (Degree of Freedom (n-2)<BR>\n" );
document.write( "critical value t = 2.3 Use Calculator or stattrek.com<BR>\n" );
document.write( "ME = 2.57 ± (2.3)(4.7)<BR>\n" );
document.write( "ME = 2.57 ± 10.81\r<BR>\n" );
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document.write( "-8.24   < m < 13.31<BR>\n" );
document.write( "Hope this helps:<BR>\n" );
document.write( "Here's a great summary with an ex, as well.<BR>\n" );
document.write( "stattrek.com/regression/slope-confidence-interval.aspx\r<BR>\n" );
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