Hello,
This is probably a very basic question, but I'm wanting to identify the name of a statistic. A professor I consulted with had written out the formula for me (attached) and I had thought this was a zscore, but she said at some point that it's not, it's another kind of statistic. She is now on sabbatical so I am no longer able to ask her. I am just wondering what I should refer to this as when writing about it.
For more background: I have a sample that I split into two separate nonoverlapping groups (top 25th percentile and bottom 75th percentile), and then I conducted logistic regression on those two groups. I then used this formula in the picture to determine whether the odds ratios that resulted were significantly different from one another for each of the independent variables for the two groups.
In case the picture is not viewable, this is the formula written out to the best of my ability:
Stat =  (Beta1  Beta2) / √ (SE1^2 + SE2^2) 
Any help greatly appreciated!
This is probably a very basic question, but I'm wanting to identify the name of a statistic. A professor I consulted with had written out the formula for me (attached) and I had thought this was a zscore, but she said at some point that it's not, it's another kind of statistic. She is now on sabbatical so I am no longer able to ask her. I am just wondering what I should refer to this as when writing about it.
For more background: I have a sample that I split into two separate nonoverlapping groups (top 25th percentile and bottom 75th percentile), and then I conducted logistic regression on those two groups. I then used this formula in the picture to determine whether the odds ratios that resulted were significantly different from one another for each of the independent variables for the two groups.
In case the picture is not viewable, this is the formula written out to the best of my ability:
Stat =  (Beta1  Beta2) / √ (SE1^2 + SE2^2) 
Any help greatly appreciated!
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