Dear all,

I would like to look to use bootstrap to look at the difference between the

ratio outcome of two groups (Ratio group 1 = 0.36 VS Ratio group 2 =

0.29).

See attached my syntax for calculating the ratio for each group and the

outcome of this syntax in my SPSS data file.

Syntax_DataSet1.sps

<

http://spssx-discussion.1045642.n5.nabble.com/file/t341365/Syntax_DataSet1.sps>

DataSet1.sav

<

http://spssx-discussion.1045642.n5.nabble.com/file/t341365/DataSet1.sav>

Because the outcome of the syntax is just one value for each group (the

ratio is an outcome of the mean of one variable divided by the mean of

another) there is no distribution of the ratio in each group and so a

statistic analysis to determine the statistical difference between these

groups is not possible.

That’s why I thought about using bootstrapping. In this case I would request

1000 bootstrap samples and then perform my analyses (syntax) for each

sample. My outcome would then consist of 1000 ratio’s (from the syntax

analysis of 1000 samples) for each group and then I would be able to compare

these median’s between the groups.

Am I right about this assumption? And is it possible to perform this kind of

bootstrapping? Does anyone know how to perform this or how to write these

steps in my syntax?

Thanks in advance!!

With kind regards,

JM

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