document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1193226>Question 1193226</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A random sample of 50 four-year-old’s attending day care centers provided a yearly tuition average of $3987 and the population standard deviation of $630. Find the 90% confidence interval of the true mean.<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 #825293 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=825293\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 90% half-interval is z(0.95)*630/sqrt(50)<BR>\n" );
document.write( "=1.645*630/sqrt(50)<BR>\n" );
document.write( "=146.56<BR>\n" );
document.write( "($3840.44, $4133.46) </SPAN>\n" );
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