document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=460651>Question 460651</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Based on the information given for each of the following studies, decide whether to reject the null hypothesis. For each, give (a) the Z-score cutoff (or cutoffs) on the comparison distribution at which the null hypothesis should be rejected, (b) the Z score on the comparison distribution for the sample score, and (c) your conclusion. Assume that all populations are normally distributed.<BR>\n" );
document.write( "Study   /  µ         /     &#963;    /  Sample Score /      p       /    Tails of Test<BR>\n" );
document.write( "A   /    100.0  /    10.0 /        80   /             .05  /      1 (low predicted)<BR>\n" );
document.write( "B   /     100.0  /    20.0    /     80    /            .01     /   2<BR>\n" );
document.write( "C     /   74.3     /   11.8     /    80      /          .01     /   2<BR>\n" );
document.write( "D   /     16.9   /     1.2      /     80      /          .05    /    1 (low predicted)<BR>\n" );
document.write( "E   /     88.1   /     12.7   /      80      /          .05    /     2<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #316011 by </B><A HREF=/tutors/aboutme.mpl?userid=edjones><B>edjones(8007)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=edjones><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=edjones><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=316011\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A)/ 100.0 / 10.0 / 80 / .05 / 1 (low predicted)<BR>\n" );
document.write( "-1.645 z-score cutoff<BR>\n" );
document.write( "z=(80-100)/10=-2<BR>\n" );
document.write( "reject the null hypothesis.<BR>\n" );
document.write( ".<BR>\n" );
document.write( "Ed </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );