Science Buddies: "Ask an Expert"

I collected the following data for my project:

boiled water (after 24 hours): 17 colonies (CFU/ML = 17)
boiled water (after 48 hours): 9 colonies (CFU/ML = 9)
1:10 diluted boiled water (after 24 hours): 6 colonies (CFU/ML = 60)

distilled water (after 24 hours): 8 colonies (CFU/ML = 8)
distilled water (after 48 hours): 13 colonies (CFU/ML = 13)
1:10 diluted distilled water (after 24 hours): 4 colonies (CFU/ML = 40)

Can I write that the average CFU/ML for boiled water is ~ 29 CFU/ML and the average CFU/ML for distilled water is ~ 20
CFU/ML?

If not, how would I find the average CFU/ML of the boiled water, and the average CFU/ML of the distilled water?

anyone?
Thanks in advance...

Hello, my name is Dasha and I'm stuck!
I am in 9th grade and I have to create a project for a science fair. I must include a testable question, research and an experiment. I am having a very hard time trying to find a topic. At first, I wanted to do it on black holes/wormholes but I found that there are no testable questions and I can not find an experiment that you can conduct! (Please let me know if you have anything, it would be big help). my favourite topic is Space but I can't seem to find anything on that topic nor testable questions or experiments. Please write back! Thanks