rashmi_k3
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This is a simple one.
Try to learn the basics of these tests. when to choose what?
Find out the variants. here two groups and Cognitive test ( improved or not)..
By the way, are the 2 drugs under study is applicable for whole patient group? This sounds confusing to me... 
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| Doc2378
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F. Pearson Correlation
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| msyamp
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no its not pearson correlation.i will explain wait
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| shaurna
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it is paired t test........
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| msyamp
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it is two student groups for which means are to be compared. so you can use ANOVA. BECAUSE IT IS ONLY TWO GREOUPS YOU CAN ALSO USE T TEST. BUT THE TEST IS DONE ON TWO DIFFERENT GROUPS AND NOT THE SAME GROUP TWICE SO YOU CANNOT USE PAIRED T TEST. STUDENT TEST IS BEST FOR BRAIN STUFF IN STUDENTS. SO WE DO THAT.
COMING TO PEARSON CORRELATOIN WE DO IT FOR PAIRED DATA. THAT IS IF WE WANT TO CORRELATE TWO VARIABLES.LIKE AGE AND IQ WE USE IT. NOT TO COMPARE MEANS OF TWO GROUPS
I JUST GAVE MY STATS EXAM IN MPH. SO I AM CONFIDENT.
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| msyamp
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hey shaurna we do paired t test for same group two times scores
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| Geroo
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J.student T test.
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| Doc2378
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Hmmm...good point Mysamp!!! can't argue with an MPH degree holder ...but aren't we comparing 2 interval data here i.e. mean scores on a memory test...
Edited by Doc2378 on 12/30/05 - 08:46 PM
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| shaurna
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thanks msyamp!
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| msyamp
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hey doc let me tell you how this is not a paired data(or bivariate). you cannot have another DOC in the other group.
in pearson's correlation
we take for example people of this forum.and we have their NBME score and USMLE score for each individual. these two score are called paired or more correctly bivariate data.
for these things we can get a pearsonson's correlation. ok.
not to compare mean scores of two seperae groups of people.
and what i know is there is a strong positive pearson's correlation betwwen those scores in the above example.
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| Doc2378
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Thanks Msyamp...this makes it a lot clearer!!!
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| sturge_weber
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hey msyamp can u explain how to choose , i mean can u explain these tests, i cant get them..
it will be helpful, thanks
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