document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=301787>Question 301787</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The critical value Zc that corresponds to a 90% confidence level is:<BR>\n" );
document.write( "The critical value Zc that corresponds to a 95% confidence level is:<BR>\n" );
document.write( "The critical value Zc that corresponds to a 99% confidence level is: </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #216405 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=216405\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  The critical value Zc that corresponds to a 90% confidence level is:<BR>\n" );
document.write( "The critical value Zc that corresponds to a 95% confidence level is:<BR>\n" );
document.write( "The critical value Zc that corresponds to a 99% confidence level is:<BR>\n" );
document.write( "------<BR>\n" );
document.write( "Confidence intervals don't really have critical values;<BR>\n" );
document.write( "hypothesis tests do.<BR>\n" );
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document.write( "But, if you want the z-value associated with 95% <BR>\n" );
document.write( "confidence, the answer is 1.96.<BR>\n" );
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document.write( "And the z-value associated with 99% confidence,<BR>\n" );
document.write( "the answer is 2.5758<BR>\n" );
document.write( "====================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );