document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=257013>Question 257013</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hello again,\r<BR>\n" );
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document.write( "Here is another question that I have:\r<BR>\n" );
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document.write( "A group of 19 randomly selected college students has a mean of 22.4 years with a standard deviation of 3.8 years. Assume the population has a normal distribution.\r<BR>\n" );
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document.write( "a.Find the margin of error for a 99% confidence interval. Round your answer to the nearest hundredths\r<BR>\n" );
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document.write( "b.Find a 99% confidence interval for the population mean &#61549;- the symbol is suppose to be a mean.\r<BR>\n" );
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document.write( "This is what I have come up with n=19, x=22.4, s=3.8, c=0.99<BR>\n" );
document.write( "d.f.=15\r<BR>\n" );
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document.write( "2.947*38/square root19=2.5<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 #189026 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=189026\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A group of 19 randomly selected college students has a mean of 22.4 years with a standard deviation of 3.8 years. Assume the population has a normal distribution.<BR>\n" );
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document.write( "a.Find the margin of error for a 99% confidence interval. Round your answer to the nearest hundredths <BR>\n" );
document.write( "b.Find a 99% confidence interval for the population mean &#61549;- the symbol is suppose to be a mean. <BR>\n" );
document.write( "This is what I have come up with n=19, x=22.4, s=3.8, c=0.99<BR>\n" );
document.write( "d.f.=15 <BR>\n" );
document.write( "2.947*3.8/square root19=2.5<BR>\n" );
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document.write( "Comment:<BR>\n" );
document.write( "I think the df is 18<BR>\n" );
document.write( "So the margin of error is 2.87844..*3.8/sqrt(19) = 2.5<BR>\n" );
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document.write( "sample mean = 22.4<BR>\n" );
document.write( "99% C.I.: 22.4-2.5 < u < 22.4+2.5<BR>\n" );
document.write( "99% CI: 19.9 < u < 24.9<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.\r<BR>\n" );
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