document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=512911>Question 512911</A>: <I><SPAN STYLE=\"word-break: break-all;\"> From a large number of actuarial exam scores, a random sample of 250 scores is selected, and it is found that 177 of these 250 are passing scores. Based on this sample, find a 90% confidence interval for the proportion of all scores that are passing. Then complete the table below.\r<BR>\n" );
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document.write( "Carry your intermediate computations to at least three decimal places. Round your answers to two decimal places.\r<BR>\n" );
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document.write( "What is the lower limit of the 90% confidence interval?<BR>\n" );
document.write( "What is the upper limit of the 90% confidence interval? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #342785 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=342785\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> From a large number of actuarial exam scores, a random sample of 250 scores is selected, and it is found that 177 of these 250 are passing scores.<BR>\n" );
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document.write( "Based on this sample, find a 90% confidence interval for the proportion of all scores that are passing. Then complete the table below.<BR>\n" );
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document.write( "p-hat = 177/250 = 0.708<BR>\n" );
document.write( "ME = 1.645*sqrt[0.708*0.292/250] = 0.047<BR>\n" );
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document.write( "Carry your intermediate computations to at least three decimal places. Round your answers to two decimal places. <BR>\n" );
document.write( "What is the lower limit of the 90% confidence interval?::0.71-0.05 = 0.66<BR>\n" );
document.write( "What is the upper limit of the 90% confidence interval?::0.71+0.05 = 0.76\r<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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