document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=924053>Question 924053</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Assume that SAT scores vary normally with a standard deviation of 100. How many students should be sampled if we want to estimate the population mean SAT at 90% confidence with a margin of error equal to 25?   </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #560542 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=560542\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> ME =  z(sd/sqrt(n))<BR>\n" );
document.write( "n = [z*s/ME]^2<BR>\n" );
document.write( "...........<BR>\n" );
document.write( "n = (1.645(100)/25)^2 = 44 (43.2964 to the next whole number) </SPAN>\n" );
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