Hello Morten.
I usually use Microsoft Excel (no affiliation), but you can use SigmaPlot,
SigmaStat, Systat, etc...
Hope this helps.
Eric
Eric Parent
Maurice Lamontagne Institute
Fisheries and Oceans Canada
Invertebrates and Experimental Biology
850 route de la mer
Mon-Joli, Qc
Canada
G5H 3Z4
parente at dfo-mpo.gc.ca
>http://www.qc.dfo-mpo.gc.ca/iml>>---