document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=240856>Question 240856</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find Z when:<BR>\n" );
document.write( "The claim is that the proportion of drowning deaths of children attributable to beaches is more than 0.25, and the sample statistics include n = 657 drowning deaths of children with 30% of them attributable to beaches. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #176514 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=176514\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Find Z when:<BR>\n" );
document.write( "The claim is that the proportion of drowning deaths of children attributable to beaches is more than 0.25, and the sample statistics include n = 657 drowning deaths of children with 30% of them attributable to beaches.<BR>\n" );
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document.write( "Ho: p = 0.25<BR>\n" );
document.write( "H1: p > 0.25<BR>\n" );
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document.write( "z(0.30) = (0.30-0.25)/sqrt[0.25*0.75/657] = 2.9597<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );