Beka,

I'm not sure that I understand your question. The Pearson Product-Moment Correlation Coefficient is generally referred to as r, but there are many different types of correlation and the symbols used sometimes vary from text to text. What text are you using? Perhaps you could post the formula that you are using as well as a detailed description of the process you went through to calculate the statistic in question.

I'm also a bit confused about what you mean by "I feel I have enough to explain with the chi-square and p-values!" The Chi-square is a test that produces a p-value. Do you mean that you have enough to explain about how and why you used a Chi-square and then the interpretation of the p-value produced? Or are you using another method in addition to Chi-square to get an additional p-value. You need to be careful that you aren't doing lots and lots of different kinds of statistical tests lots and lots of times because then you get into issues associated with multiple testing. It's a bit much to explain two days before the fair, but if you go on, we can discuss this more.

Your conclusion should be short, sweet, and to the point. Nothing is more unhelpful than a lengthy conclusion. I would say something along the lines of "I found strong evidence that [population description here] [insert conclusion here]." You can discuss the sampling issues in your discussion.