Wilcoxon signed ranks test

[DaniS]

Can anyone help me figure out calculating the confidence interval for a Wilcoxon signed ranks test using SPSS? I am having trouble figuring it out, so any feedback is greatly appreciated. Thanks!

 

[Karabiner]

For which parameter do you wish to calculate a confidence interval?
Or do you mean, for the z value of the test?

With kind regards

Karabiner

 

[DaniS]

Hello, thanks for your response.
I am not very well versed in statistics so I will do my best to answer these questions. We are looking at the effect of a drug in the eye from baseline to day X. We need to CI for the treatment effect. I hope that makes sense.

 

[Karabiner]

So you must have a definiton of "treatment effect" in terms of a statistical parameter
(mean, median etc.). On the other hand, Wicoxon signed rank test does not test mean,
median etc., therefore it might be asked what the confidence interval for the z statistic is.

I am not very well versed in statistics

If you make an experiment with humans or animals, from the ethical point of view
at least one person involved should have statistical expertise.

With kind regards

Karabiner