document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=873043>Question 873043</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A random sample of 625 SAT scores has a mean of 1500. Assume that SAT scores have <BR>\n" );
document.write( "a population standard deviation of 250. Construct a 95% confidence interval estimate of the mean SAT scores. Show all work. Just the answer, without supporting work, will receive no credit </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #526610 by </B><A HREF=/tutors/aboutme.mpl?userid=reviewermath><B>reviewermath(1029)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=reviewermath><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=reviewermath><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=526610\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Q:<BR>\n" );
document.write( "A random sample of 625 SAT scores has a mean of 1500. Assume that SAT scores have <BR>\n" );
document.write( "a population standard deviation of 250. Construct a 95% confidence interval estimate of the mean SAT scores. Show all work. Just the answer, without supporting work, will receive no credit<BR>\n" );
document.write( "A:<BR>\n" );
document.write( "For the lower limit of the confidence interval, enter the following formula in Excel: =1500+NORMSINV(.025)*250/SQRT(625)\r<BR>\n" );
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document.write( "For the upper limit of the confidence interval, enter the following formula in Excel: =1500-NORMSINV(.025)*250/SQRT(625)\r<BR>\n" );
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document.write( "Therefore, the 95% confidence interval is (1480.4, 1519.6)  </SPAN>\n" );
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