document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=428865>Question 428865</A>: <I><SPAN STYLE=\"word-break: break-all;\"> publishing scientific papers online is fast, and the papers can be long. Publishing in a paper journal means that the paper will live foreve in libraries. the british Medical Journal combines the two:it prints short and reasable versions, with longer verison available online/ ots this OK with authors? the journal asked about a random sample of 104 of its recent authors several questions. one question was \" should the journal using this system?\" in the sample 72 said \" yes.\" (a) do the data give good evidence that more than two-thirds (67%) of authors support continuing this system? carry out an appropriate test to help answer this question. (b) interpret the p-values from your test in the context of the problem.<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #297982 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=297982\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  the journal asked about a random sample of 104 of its recent authors several questions. one question was \" should the journal using this system?\" in the sample 72 said \" yes.\" <BR>\n" );
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document.write( "(a) do the data give good evidence that more than two-thirds (67%) of authors support continuing this system? carry out an appropriate test to help answer this question. <BR>\n" );
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document.write( "Ho: p = 0.67<BR>\n" );
document.write( "Ha: p > 0.67 (claim)<BR>\n" );
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document.write( "p-hat = 72/104 = 0.69<BR>\n" );
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document.write( "z(0.69) = (0.69-0.67)/sqrt[0.67*0.33/104] = 0.4338<BR>\n" );
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document.write( "p-value = P(z > 0.4338) = 0.3322<BR>\n" );
document.write( "Since the p-value is greater than 5% fail to reject Ho<BR>\n" );
document.write( "at the 5% significance level.<BR>\n" );
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document.write( "(b) interpret the p-values from your test in the context of the problem.<BR>\n" );
document.write( "More than 33% of test results could have provided stronger <BR>\n" );
document.write( "evidence for rejecting Ho.<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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