Page 1 of 5: Library: Paired and Unpaired tests?

manpreet108 · Credits: 30702 My Scrapbook

if birth weights of two babies borne by a same woman,in two consequtive pregnancies--one without intake of iron and other with intake of iron are compared ---what type of test is it??

i think --paired t test....

pls comment and confirm.

draditithegreat · Credits: 1248020 My Scrapbook

paired is used when

X is measured
then we add the thing whose effect is seen and then we again measure the X now..

so here
BW is measured without iron
iron is given
again the BW is measured!

so even i feel paired!!

do tell us if its right and
pls correct if its wrong!!!!

manpreet108 · Credits: 30702 My Scrapbook

welll.....thats a hypothetical doubt that cropped up in my mind!

when we measure two different groups--for one parameter -its unpaired t test.
like bith wt in two groups of babies-one with iron intake and one without iron intake in the mother.

here also we are measuing two groups-2 seperate babies --but the intervention is done on the same lady----so i am almost confident its a paired test.

like usually qns have--measure -----then intervene ---then measure again in the same person--then its a paired test.

but here we are measuring two babies as an out come of intervention...
so means the same ,right ?

thats what i wanted to check .
lets see if someothers help too.....

manpreet108 · Credits: 30702 My Scrapbook

by the way --thanks aditi for yr help.

draditithegreat · Credits: 1248020 My Scrapbook

babies are the parameter out here which is to be checked and the subject is the woman!!!!!

lets see what others have to say on this!

drprasu · Credits: 5755 My Scrapbook

we are looking for effect not on mother but
on babies.
so the subject are 2 in number
we are comparing effects on two different
persons(babies)
its like giving iron to one subject and withholding it from other and checking the effect
so as manpreet said
"when we measure two different groups--for one parameter -its unpaired t test. "

draditithegreat · Credits: 1248020 My Scrapbook

u r sounding quite convincing drprasu!!!

drprasu · Credits: 5755 My Scrapbook

am i really???

manpreet108 · Credits: 30702 My Scrapbook

actually i dont agree by u drprasu--if u are implying that the ans is unpaired!

we are comparing the consequences of one intervention on the lady.

how does it make differencethen--that we are doing it on two babies?--they are just projecting the result of what we want to study--like iron therapy in pregnancy.

do u agree with me now??

manpreet108 · Credits: 30702 My Scrapbook

Dr bruno pls help!
since this qn is not out of book--nd involves a concept.we must get it right.yr guidance is invaluable here.

regards.

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