document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=64374>Question 64374</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A researcher wants to determine whether or not the percentage in population A is less than the percentage in population B.  A sample of 161 items from population A had a sample percentage of 20% while a sample of 189 items from population B had a sample percentage of 25%.  If a significance level of .05 is used, which of the following statements is correct?\r<BR>\n" );
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document.write( "1. left-tailed test with Z = -1.96<BR>\n" );
document.write( "2. left-tailed test with Z = -1.65<BR>\n" );
document.write( "3. left-tailed test with Z = +1.65<BR>\n" );
document.write( "4. right-tailed test with Z = +1.65<BR>\n" );
document.write( "5. left-tailed test with Z = -2.33\r<BR>\n" );
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document.write( "I figured t-score=1.113, degrees of freedom=348, its a two-tailed test=.2665, from here I am lost. can someone help me please.... </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #45004 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=45004\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A researcher wants to determine whether or not the percentage in population A is less than the percentage in population B. A sample of 161 items from population A had a sample percentage of 20% while a sample of 189 items from population B had a sample percentage of 25%. If a significance level of .05 is used, which of the following statements is correct? <BR>\n" );
document.write( "1. left-tailed test with Z = -1.96<BR>\n" );
document.write( "2. left-tailed test with Z = -1.65<BR>\n" );
document.write( "3. left-tailed test with Z = +1.65<BR>\n" );
document.write( "4. right-tailed test with Z = +1.65<BR>\n" );
document.write( "5. left-tailed test with Z = -2.33 <BR>\n" );
document.write( "I figured t-score=1.113, degrees of freedom=348, its a two-tailed test=.2665, from here I am lost. <BR>\n" );
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document.write( "Since the researcher is testing \"less than\" the test is a left-tail test.<BR>\n" );
document.write( "Since a significance level of 0.05 is stated you want z=-1.65<BR>\n" );
document.write( "ANSWER is # 2<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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