document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1129582>Question 1129582</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A random sample of <BR>\n" );
document.write( "861<BR>\n" );
document.write( "861 births included <BR>\n" );
document.write( "430<BR>\n" );
document.write( "430 boys. Use a <BR>\n" );
document.write( "0.10<BR>\n" );
document.write( "0.10 significance level to test the claim that <BR>\n" );
document.write( "50.5<BR>\n" );
document.write( "50.5&#8203;% of newborn babies are boys. Do the results support the belief that <BR>\n" );
document.write( "50.5<BR>\n" );
document.write( "50.5&#8203;% of newborn babies are&#8203; boys? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #746147 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=746147\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Ho: p=0.505 or greater<BR>\n" );
document.write( "Ha: p<0.505<BR>\n" );
document.write( "alpha=0.10<BR>\n" );
document.write( "one sample proportion<BR>\n" );
document.write( "critical value |z|>1.645<BR>\n" );
document.write( "z=(p hat-p)/sqrt(.505*.495/861); sqrt term=0.0170<BR>\n" );
document.write( "p hat=0.499<BR>\n" );
document.write( "z=-0.006/0.170<BR>\n" );
document.write( "z=-0.35<BR>\n" );
document.write( "fail to reject; insufficient evidence to conclude true proportion is < 0.505. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );