document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1044443>Question 1044443</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In a study of 420,009 cell phone&#8203; users, 157 subjects developed brain cancer. Test the claim that cell phone users develop brain cancer at a rate that is different from the rate of&#8203; 0.0340% for people who do not use cell phones. Because this issue has such great&#8203; importance, use a 0.005 significance level. Use this information to answer the following questions.\r<BR>\n" );
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document.write( "B. What is the test statistic? <BR>\n" );
document.write( "C. What is the P-vaule </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #659781 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=659781\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Ho:P=0.000340<BR>\n" );
document.write( "Ha:P NE to 0.000340<BR>\n" );
document.write( "alpha=0.005<BR>\n" );
document.write( "test statistic is one-sample proportion (phat-p)/{sqrt(p*(1-p))/n}<BR>\n" );
document.write( "z=(phat-0.000340)/sqrt{(0.000340)(0.99966)/420009}; phat is 157/420,009=0.00037<BR>\n" );
document.write( "SE=sqrt {(0.0003399)/420009}=0.00002845<BR>\n" );
document.write( "Critical value is  z>|2.576|<BR>\n" );
document.write( "Calculation is z= -(0.00003)/SE=-1.05<BR>\n" );
document.write( "p-value is 0.23<BR>\n" );
document.write( "Fail to reject Ho<BR>\n" );
document.write( " </SPAN>\n" );
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