document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1195793>Question 1195793</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 2.Past data indicated that attrition rate of students in HU is 10%. Students’ Union believes that the attrition rate has decreased last academic year. To test this assumption the union selected 150 students randomly and 12 students, who do not completed their education, leaved the university. Formulate hypothesis testing with 5% α; assume the distribution is normally distributed.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #828324 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=828324\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Ho: rate is 10%<BR>\n" );
document.write( "Ha: rate is not 10%<BR>\n" );
document.write( "alpha is 0.05 p{reject Ho|Ho true}<BR>\n" );
document.write( "test is z= (phat-0.10)/sqrt(p*(1-p)/n)<BR>\n" );
document.write( "reject if |z|>1.96<BR>\n" );
document.write( "z=(0.08-0.10)/sqrt(0.1*0.9/150)<BR>\n" );
document.write( "=-0.02/0.0245=-0.82<BR>\n" );
document.write( "fail to reject; insufficient evidence to say there has been any chang. </SPAN>\n" );
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