Hi Artur
Thanks very much for pointing this out. I did the means by group and it worked, and, good news, the results seem consistent with SAS and with other stat software.
Question though.
The results come out like this:
AreaRegion = Australia - Oceania (n = 22):
Mean 1.5576e+006
Is it possible to get the values to come out as exact numbers rather than something point something + e006?
For example, in the region Australia - Oceania, the mean population is 1,557,590, but I can't tell if gretl is giving that exact result.
In the data set in question, the variable of interest is population, so the number of digits can be quite large.
Actually, another question, the summary statistics gives many statistics. Is it possible to include sum as one of them? That is, in addition to mean population by area/region, is it possible to get sum of population by area/region?
Thanks
Gene