document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=888678>Question 888678</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Which condition must be met to conduct a test for the difference in two sample means using a z-statistic? \r<BR>\n" );
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document.write( "a)Data must be at least of nominal scale.<BR>\n" );
document.write( "b)Populations must be normal.<BR>\n" );
document.write( "c)Standard deviations of the two populations must be known.<BR>\n" );
document.write( "d)Samples are dependent.<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 #537589 by </B><A HREF=/tutors/aboutme.mpl?userid=Theo><B>Theo(13342)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Theo><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=Theo><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=537589\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> i believe the z score requires the standard deviation of the population be known.<BR>\n" );
document.write( "that points to selection c.\r<BR>\n" );
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