document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=185674>Question 185674</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Can someone please help me solve this? thank you so much\r<BR>\n" );
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document.write( "Managers at an automobile manufacturing plant would like to estimate the mean completion time of an assembly line operation, u. The managers plan to choose a random sample of completion times and estimate u via the sample. Assuming that the standard deviation of the population of completion times is 12.3 minutes, what is the minimum sample size needed for the managers to be 95% confident that their estimate is within 1.5 minutes of u? \r<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 #139269 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=139269\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Can someone please help me solve this? thank you so much <BR>\n" );
document.write( "Managers at an automobile manufacturing plant would like to estimate the mean completion time of an assembly line operation, u. The managers plan to choose a random sample of completion times and estimate u via the sample. Assuming that the standard deviation of the population of completion times is 12.3 minutes, what is the minimum sample size needed for the managers to be 95% confident that their estimate is within 1.5 minutes of u? <BR>\n" );
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document.write( "Use the formula E = z = 16.07<BR>\n" );
document.write( "n = 258.31<BR>\n" );
document.write( "Rounding up you get n = 259<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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