document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1141191>Question 1141191</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A sample of 300 high school juniors found that 195 of them took the SAT more than once. Find the 99% confidence interval for the proportion of all high school juniors who took the SAT more than once. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #761776 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=761776\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The point estimate of the probability is 195/300=0.65<BR>\n" );
document.write( "the 99% CI is p hat, 0.65 +/- z (2.576 for 99% CI) *sqrt(p(1-p)/n), which is sqrt (0.65*0.35/300)<BR>\n" );
document.write( "this is 0.65+/-2.576*0.0275<BR>\n" );
document.write( "=0.65+/-0.0709<BR>\n" );
document.write( "(0.58, 0.72) </SPAN>\n" );
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