document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=924701>Question 924701</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Thirty-five 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" );
document.write( "lower limit    	  <BR>\n" );
document.write( "Incorrect: Your answer is incorrect.<BR>\n" );
document.write( "upper limit    	  <BR>\n" );
document.write( "Incorrect: Your answer is incorrect.<BR>\n" );
document.write( "margin of error    	  <BR>\n" );
document.write( "Incorrect: Your answer is incorrect.\r<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.)<BR>\n" );
document.write( "lower limit    	 <BR>\n" );
document.write( "upper limit    	 <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.)<BR>\n" );
document.write( "lower limit    	 <BR>\n" );
document.write( "upper limit    	 <BR>\n" );
document.write( "margin of error    	 <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 #561035 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=561035\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Thirty-five 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" );
document.write( "x-bar = 138.5<BR>\n" );
document.write( "ME = 1.645*44.5/sqrt(35) = 12.38<BR>\n" );
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document.write( " lower limit  = 138.5-12.38 = 126.1<BR>\n" );
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document.write( " upper limit = 138.5+12.38 = 150.0<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.)<BR>\n" );
document.write( " lower limit:: 138.5-1.96*44.5/sqrt(35) = 123.8 <BR>\n" );
document.write( "upper limit:: 138.5+1.96*44.5/sqrt(35) = 153.2<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.)<BR>\n" );
document.write( "Comment:: Change the \"z\" value to 2.5758 and do the arithmetic<BR>\n" );
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document.write( " lower limit <BR>\n" );
document.write( "upper limit<BR>\n" );
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document.write( "margin of error<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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