Hi!

I must compare statistically some data, which refer to repeated measures of the same individuals over time. The problem is that, at different times, I do not have always the same number of measures.

When I check for normality and when I apply the Friedman test, SPSS "cuts" the data to the minimum number of equal samples over time. How can I adjust the data file or how should I tell SPSS to include in the analysis ALL the data, even if the number of measurements at the various time steps changes?