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Hello Mr. Voltini,
Pairing of data is only usefull in the case, that samples can be taken =
pairwise and undergo some different treatment ( which may be very =
diverse ! ). It is absolutely necessary that the pair originates from =
the same material or source. If this cannot be guaranteed, paired data =
testing is useless.
Karel Postulart
The Netherlands
Voltolini <[EMAIL PROTECTED]> schreef in berichtnieuws =
00b201c1e051$ced62cc0$[EMAIL PROTECTED]
Dear friends, I understand that doing a before and after experiment is =
a good situation to use a paired design because you can measure the same =
individuals but.... I saw some examples considering the measuremente of =
the same area as a paired situation but, the individuals are not =
controled, so I can measure different individuals. So, the pair is not a =
couple of individuals but the two areas. Is it correct ? If you are =
measuring the individuals inside the two areas, it seems to me that I =
need to pair the individuals and not the areas ! I also read another =
example pairing the data because the two samples have genetic =
relatedness !
=20
So... what is the correct logic of pairing ?
Thanks......
V.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Prof. J. C. VOLTOLINI
Grupo de Estudos em Ecologia de Mamiferos (ECOMAM)
Universidade de Taubate, Departamento de Biologia
Praca Marcelino Monteiro 63, Bom Conselho.
Taubate, SP. CEP 12030-010. BRASIL.
Tel: 0XX12 - 2254165 (Lab. Zool.) ou 2254277 (Depto. Biol.)
E-Mail: [EMAIL PROTECTED]
http://www.mundobio.rg3.net/
http://www.sobresites.com/ecologia/institui.htm
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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<DIV><FONT face=3DArial size=3D2>Hello Mr. Voltini,</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=3DArial size=3D2>Pairing of data is only usefull in the =
case, that=20
samples can be taken pairwise and undergo some different treatment ( =
which may=20
be very diverse ! ). It is absolutely necessary that the pair originates =
from=20
the same material or source. If this cannot be guaranteed, paired data =
testing=20
is useless.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=3DArial size=3D2>Karel Postulart</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>The Netherlands</FONT></DIV>
<BLOCKQUOTE=20
style=3D"BORDER-LEFT: #000000 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: =
0px; PADDING-LEFT: 5px; PADDING-RIGHT: 0px">
<DIV>Voltolini <<A=20
href=3D"mailto:[EMAIL PROTECTED]";>[EMAIL PROTECTED]</A>> =
schreef in=20
berichtnieuws 00b201c1e051$ced62cc0$[EMAIL PROTECTED]</DIV>
<DIV><FONT face=3DArial size=3D2>Dear friends, I </FONT><FONT =
face=3DArial=20
size=3D2>understand that doing a before and after experiment is a=20
good situation to use a paired design because you can=20
measure the same individuals but.... I saw s</FONT><FONT =
face=3DArial=20
size=3D2>ome examples considering the measuremente of the =
same area as=20
a paired situation but, the individuals are not controled, so I can =
measure=20
different individuals. So, the pair is not a couple of =
individuals=20
but the two areas. Is it correct ? If you are measuring the =
individuals inside=20
the two areas, it seems to me that I need to pair the =
individuals=20
and not the areas ! I also read another example pairing the data =
because=20
the two samples have genetic relatedness !</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>So... what is the correct logic of =
pairing=20
?</FONT></DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV><FONT face=3DArial size=3D2>Thanks......</FONT></DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV><FONT face=3DArial size=3D2>V.</FONT></DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV><FONT face=3DArial =
size=3D2>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<BR>Prof.=20
J. C. VOLTOLINI<BR>Grupo de Estudos em Ecologia de Mamiferos=20
(ECOMAM)<BR>Universidade de Taubate, Departamento de Biologia<BR>Praca =
Marcelino Monteiro 63, Bom Conselho.<BR>Taubate, SP. CEP 12030-010.=20
BRASIL.<BR>Tel: 0XX12 - 2254165 (Lab. Zool.) ou 2254277 (Depto.=20
Biol.)<BR>E-Mail: <A=20
href=3D"mailto:[EMAIL PROTECTED]";>[EMAIL PROTECTED]</A><BR><A=20
=
href=3D"http://www.mundobio.rg3.net/";>http://www.mundobio.rg3.net/</A><BR=
><A=20
=
href=3D"http://www.sobresites.com/ecologia/institui.htm";>http://www.sobre=
sites.com/ecologia/institui.htm</A><BR>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~=
~~~~<BR></FONT></DIV></BLOCKQUOTE></BODY></HTML>
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