document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1148655>Question 1148655</A>: <I><SPAN STYLE=\"word-break: break-all;\"> You are conducting a study to see if the proportion of women over 40 who regularly have mammograms is significantly less than 0.81. You use a significance level of α=0.02.\r<BR>\n" );
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document.write( "      H0:p=0.81<BR>\n" );
document.write( "      H1:p<0.81\r<BR>\n" );
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document.write( "You obtain a sample of size n=249 in which there are 181 successes.\r<BR>\n" );
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document.write( "What is the test statistic for this sample? (Report answer accurate to three decimal places.)<BR>\n" );
document.write( "test statistic =\r<BR>\n" );
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document.write( "What is the p-value for this sample? (Report answer accurate to four decimal places.)<BR>\n" );
document.write( "p-value =  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #770049 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=770049\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> p hat=181/249=0.727<BR>\n" );
document.write( "test stat is a z=(0.727-0.81)/sqrt(0.81*0.19/249)  it is difference of means/sqrt(p*(1-p)/n)<BR>\n" );
document.write( "=-0.083/0.0249=-3.342<BR>\n" );
document.write( "p=0.0004<BR>\n" );
document.write( "To get this result, round only at the end. </SPAN>\n" );
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