odds ratio: calculation unclear
Posted: Tue Jun 02, 2020 6:51 am
Hi,
I am looking at the hypothesis, that there is a difference between gender and group membership to "hxTypAchiever".
It looks like this:
The problem (for me) is, that I assumed, that the probability to belong to the hxAchiever group for male people is .552 of that for female.
I come to this interpretation, because male is the group shown left (before) female in the contingency table.That makes me assume odds ratio displays male-to-female-relation.
I used Field[1], section 19.8.4 to calculate the odds ratio by hand (Excel):
The first (top) calculation shows male-to-female relation, the second (bottom) female-to-male.
As you can see, the odds ratio calculated by jamovi is actually the one of female-to-male.
How does the user know, which way is calculated without recalculating by hand? I would think, this is knowledge needed for meaningful interpretation and should maybe be shown somewhere.
[1] Field, A. (2018). Discovering statistics using IBM SPSS statistics (5. Aufl.). Los Angeles: SAGE.
Olaf
I am looking at the hypothesis, that there is a difference between gender and group membership to "hxTypAchiever".
It looks like this:
The problem (for me) is, that I assumed, that the probability to belong to the hxAchiever group for male people is .552 of that for female.
I come to this interpretation, because male is the group shown left (before) female in the contingency table.That makes me assume odds ratio displays male-to-female-relation.
I used Field[1], section 19.8.4 to calculate the odds ratio by hand (Excel):
The first (top) calculation shows male-to-female relation, the second (bottom) female-to-male.
As you can see, the odds ratio calculated by jamovi is actually the one of female-to-male.
How does the user know, which way is calculated without recalculating by hand? I would think, this is knowledge needed for meaningful interpretation and should maybe be shown somewhere.
[1] Field, A. (2018). Discovering statistics using IBM SPSS statistics (5. Aufl.). Los Angeles: SAGE.
Olaf