document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=195815>Question 195815</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In a British study around 1950, a group of 649 men with lung cancer were surveryed. A control group of the same size was established from a set of men who did not have lung cancer. The groups were matched according to ethnicity, age, and socieconomic status. The statistics from the survey follow.<BR>\n" );
document.write( "Smokers:   647 lung cancer cases, 622 control, total 1269<BR>\n" );
document.write( "non smokers: lung cancer cases 2, control 27, total 29\r<BR>\n" );
document.write( "\n" );
document.write( "A.) what is the proportion of smiling in the goupd that has lung cancer in the study?<BR>\n" );
document.write( "B.) what is the proportion of smoking in the control group?<BR>\n" );
document.write( " C.) if a person is chosen at random from each of the two groups(smokers and non smokers) what is the probability that each person chosen has cancer?<BR>\n" );
document.write( "D.) do you think this data presents a strong associatin between lung cancer and smoking?<BR>\n" );
document.write( "e.)Do you think that this evidence is conclusive that smoking causes lung cancer?(problem taken from curriculum framework). </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #146904 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=146904\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> In a British study around 1950, a group of 649 men with lung cancer were surveryed. A control group of the same size was established from a set of men who did not have lung cancer. The groups were matched according to ethnicity, age, and socieconomic status. The statistics from the survey follow.<BR>\n" );
document.write( "Smokers: 647 lung cancer cases, 622 control, total 1269<BR>\n" );
document.write( "non smokers: lung cancer cases 2, control 27, total 29 <BR>\n" );
document.write( "A.) what is the proportion of smoking in the goup that has lung cancer in the study?<BR>\n" );
document.write( "647/1269<BR>\n" );
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document.write( "B.) what is the proportion of smoking in the control group?<BR>\n" );
document.write( "622/649<BR>\n" );
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document.write( "C.) if a person is chosen at random from each of the two groups(smokers and non smokers) what is the probability that each person chosen has cancer?<BR>\n" );
document.write( "647/1269 + 2/29 = 0.5788<BR>\n" );
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document.write( "D.) do you think this data presents a strong associatin between lung cancer and smoking?<BR>\n" );
document.write( "Maybe<BR>\n" );
document.write( "============<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "e.)Do you think that this evidence is conclusive that smoking causes lung cancer? </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );