document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1118453>Question 1118453</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The employees of Electronics Inc. would like to have a dental plan as part of their benefits package. The question is: How much does a typical employee and his or her family spend per year on dental expenses? A sample of 46 employees reveals the mean amount spent last year was $1900, with a standard deviation of $630.\r<BR>\n" );
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document.write( "a.	Construct a 98% confidence interval for the population mean. (Round the final answers to the nearest whole dollar.\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 #733831 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=733831\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The employees of Electronics Inc. would like to have a dental plan as part of their benefits package. The question is: How much does a typical employee and his or her family spend per year on dental expenses? A sample of 46 employees reveals the mean amount spent last year was $1900, with a standard deviation of $630. \r<BR>\n" );
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document.write( "a.	Construct a 98% confidence interval for the population mean. (Round the final answers to the nearest whole dollar. <BR>\n" );
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document.write( "sample mean:: 1900<BR>\n" );
document.write( "Margin of Error:: z(s/sqrt(n)) = 2.3263(630/sqrt(46)) = 216<BR>\n" );
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document.write( "98% CI:: 1900-216 < u < 1900+216<BR>\n" );
document.write( "98% CI:: 1684 < u < 2116<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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