Is better to use the IDW tool or the kriging and why?

[GiacomoRossi]

Hi,
I am an Italian student of GIS and for my thesis I have to study many points that must be interpolated. When do you think is better to use the inverse distance weighted and when the kriging and why?
Can you answer as soon as possible, please, that I have to tell it to my professor tomorrow, please!
Thank you
Giacomo

[JeffreySwain · Accepted solution]

I am not sure if the forums are a good spot to answer homework.  I would recommend researching interpolation.

[michaelcollins1]

Or try these:

http://www.geogr.uni-jena.de/~c5hema/gis_ws04/lab2/geostats.htm

http://www.personal.psu.edu/ksp117/486_lesson5.htm

http://www.bisolutions.us/A-Brief-Introduction-to-Spatial-Interpolation.php