document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=324061>Question 324061</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 2.	The new Twinkle bulb has a standard deviation  hours. A random sample of 50 light bulbs is selected from inventory. The sample mean was found to be  550 hours. \r<BR>\n" );
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document.write( "a.	Find the margin of error E for a 90% confidence interval. <BR>\n" );
document.write( "     Round your answer to the nearest hundredths. \r<BR>\n" );
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document.write( "b.	Construct a 90% confidence interval for the mean life, &#61549; of all Twinkle bulbs.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #231938 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=231938\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> standard deviation is missing<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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