document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=635420>Question 635420</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Twenty-six small communities in Connecticut (population near 10,000 each) gave an average of x = 138.5 reported cases of larceny per year. Assume that &#963; is known to be 44.5 cases per year.<BR>\n" );
document.write( " (a) Find a 90% confidence interval for the population mean annual number of reported larceny cases in such communities. What is the margin of error? (Round your answers to one decimal place.) <BR>\n" );
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document.write( "(b) Find a 95% confidence interval for the population mean annual number of reported larceny cases in such communities. What is the margin of error? (Round your answers to one decimal place.) \r<BR>\n" );
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document.write( "(c) Find a 99% confidence interval for the population mean annual number of reported larceny cases in such communities. What is the margin of error? (Round your answers to one decimal place.) \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 #400318 by </B><A HREF=/tutors/aboutme.mpl?userid=ewatrrr><B>ewatrrr(24785)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ewatrrr><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/cgi-bin/show-face.mpl?user=ewatrrr><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=400318\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">   <PRE STYLE=\"white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;\"><font face = \"Tohoma\" size = 3 color = \"indigo\"><b> <BR>\n" );
document.write( "Hi,<BR>\n" );
document.write( "Note:  z-values for various confidence levels<BR>\n" );
document.write( "90%	z = 1.645<BR>\n" );
document.write( "95%	z = 1.96<BR>\n" );
document.write( "98%	z = 2.33<BR>\n" );
document.write( "99%	z = 2.576<BR>\n" );
document.write( "a) ME =  1.645(44.5/sqrt(10000)= .732<BR>\n" );
document.write( " 138.5 - ME < <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=mu ALIGN=MIDDLE  ALT=\"mu\"   DISABLED_style= \"max-width:90%; height:auto;\" > < 138.5 + ME<BR>\n" );
document.write( "b)ME =  1.96(44.5/sqrt(10000)= .873<BR>\n" );
document.write( " 138.5 - ME < <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=mu ALIGN=MIDDLE  ALT=\"mu\"   DISABLED_style= \"max-width:90%; height:auto;\" > < 138.5 + ME<BR>\n" );
document.write( "c)ME =  2.576(44.5/sqrt(10000)= 1.146<BR>\n" );
document.write( " 138.5 - ME < <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=mu ALIGN=MIDDLE  ALT=\"mu\"   DISABLED_style= \"max-width:90%; height:auto;\" > < 138.5 + ME </SPAN>\n" );
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