Good Evening,

I am conducting non-parametric tests (kruskal-wallis and mann-whitney) on weighted data. The weighting variable is to two decimal places. However when the output is generated I am getting the following error messages, and the 'n' number is greater than the 'n' number of the weighted dataset:

Can anyone please advise on this error message and how it should be dealt with in my analysis?

Thank you.

It depends on which procedure you are running, but for nonparametric tests, the weights are generally rounded to the nearest integer.  I can't see any error message in your post, though.

Hi John,

Hi Jon,

The error message states:
'Frequency weight data values must be positive integers'
'Positive non-integer frequency weight data values are encountered. These values are rounded to the nearest integers for analysis.'

The purpose of applying the weightings variable in my analysis is to make the sample representative of the total population. Therefore can you please advise what impact the rounding of the weighting values to integers will have on my analysis and any approaches that I should take? 

Thank you.