"Osmosis is the movement of particles from a higher concentration to a lower concentration"

WATER MOLECULES, not particles - osmosis ONLY refers to water.You also need to make it clear that you are talking about lower and higher concentrations of WATER. ("Low concentration" normally refers to a lot of water with only a little solute).
Besides the constant mention of particles, your explanation is not very clear and it does not convince me that you understand it - I suggest you re-write this section and try to make your explanation as clear as possible - use diagrams to help. Quoting from the Internet is not a good idea - you will get no credit for an Internet explanation - it MUST be in your own words. Remember, too, that in osmosis, water moves in BOTH directions - it is just that MORE moves from where there is more water than in the reverse direction.

"Make sure that all of the potato cells are of the same measurement otherwise I will not be able to compare the change in weight."

What do you mean "the same measurement"? Length? Diameter?

"I will also put 3 potato cells in each beaker so that I can find an average weight for each concentration"

You are not using individual potato CELLS - they would be microscopic - you are using pieces of potato.

In fair testing, you list a variable - "Conditions (may effect the potato cell)" WHAT 'conditions'??????
Your graph entitled "to show change in weight" DOESN'T! It shows WEIGHT, not CHANGE in weight.

"I feel that the experiments that I did were all successful because they all gave me a set of results that I could use to produce graphs. " Being able to plot a graph does not mean the results are OK!

I'm afraid there is quite a lot of evidence here of misunderstanding of both osmosis and of experimental technique. I really think you ought to discuss this with your teacher.

For planning at GCSE, I would say that this work would be worth 5 or 6/8. The work is fine, but the experiment itself is not, if you want to get 7 or 8 marks. What is the point of testing different vegetables to find out if osmosis takes place? It is a bit like cutting people of different races to see if bleeding takes place! The usual experiment done on osmosis is an investigation of different sugar concentrations on osmosis. In your case, as well, the preliminary experiment does not really inform the experiment. For example, if you were to do the concentration experiment, then you could do a preliminary experiment to see what range of concentrations work best. Your 'preliminary experiment' is really only a repeat of one of your actual experiments. Given the weakness of the experiment itself, you have done as
well as you can. Marks have to take into account the complexity of the experiment and this is very simple, so would not warrant 7 or 8 marks however well you did it!

This is no where near complete is it? I hope not as I can not grade your work so far.

There are 3 main components to a statistics coursework - a plan, carrying out the plan and interpretation. You have not completed any of these sections. You have a good sample but need to do something with it ( and most importantly plan it first).

Note from system: No grade awarded, defaulted to C grade.