document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=854092>Question 854092</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In a test of the effectiveness of garlic for lowering cholesterol, 45 subjects were treated with garlic in a processed tablet form. Cholesterol levels were measured before and after the treatment. The changes in their levels of LDL cholesterol )in mf/dl) have a mean of 5.6 and standard deviation of 19.5<BR>\n" );
document.write( "a. What is the best point estim ate of the population mean net change in LDL cholesterol after the garlic treatment?<BR>\n" );
document.write( "b. Construct a 90% confidence interval of the mean net change in LDL cholesterol after the garlic treatment. What does the confidence interval suggest about the effectiveness of garlic in reducing LDL cholesterol. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #514431 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=514431\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  In a test of the effectiveness of garlic for lowering cholesterol, 45 subjects were treated with garlic in a processed tablet form. Cholesterol levels were measured before and after the treatment. The changes in their levels of LDL cholesterol )in mf/dl) have a mean of 5.6 and standard deviation of 19.5<BR>\n" );
document.write( "a. What is the best point estim ate of the population mean net change in LDL cholesterol after the garlic treatment?<BR>\n" );
document.write( "Ans: 5.6 mf/dl<BR>\n" );
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document.write( "b. Construct a 90% confidence interval of the mean net change in LDL cholesterol after the garlic treatment. <BR>\n" );
document.write( "ME = 1.645*19.5/sqrt(45) = 4.78<BR>\n" );
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document.write( "90% CA:: 5.6-4.78 < u < 5.6+4.78<BR>\n" );
document.write( "90%CA:: 0.82 < u < 10.38<BR>\n" );
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document.write( "What does the confidence interval suggest about the effectiveness of garlic in reducing LDL cholesterol.<BR>\n" );
document.write( "The mean is slightly higher than 5.6.<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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document.write( " </SPAN>\n" );
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