What does 'probability of obtaining this value of chi-squared' mean?

Question

More specifically, what does this probabilty tell me about the density or abundance of an organism if any?

Answer 1

Chi-square has lots of uses. It describes the distribution of sample variance values when those samples are drawn from a Normal (Gaussian) distribution. I don't know how, exactly it relates to the density of an organism.

Answer 2

does chi-square have to have to have a normal distribution? I though it was a non-parametric.

To answer the question. This type of hypothesis test determines the probability that the difference between the mean of the groups are due to chance. For instance a chi-square "cut-off" of .05 would estimate that the difference between the treatment group and the control group maintains only a 5 % chance of not being due to the treatment.

If I understand your problem; a section of forest has 15 deer per acre, another section has 22 deer per acre. Placing these numbers in the chi-square table will yield a result. If in the chi-square matrix of critical values shows that it is significant at a certain level (.001, .05, .1) then the difference is not due to chance.
I hope this answers your question. post again if not.

Answer 3

Ho would be examined at a point of value it is denoted with alpha or a. alpha is expressed as a share or a decimal fee. 0.05 ability the Ho is examined at 5% point of value. 0.01 ability the H0 is examined at a million% point of value. 0.10 ability the Ho is examined at 10% point of value. the point of value shows that the tip drawn inclusive of rejecting Ho or accepting Ho, isn't impressive to that quantity. If Ho is rejected at 5% point of value, the determination drawn is asserted to be authentic with ninety 5% (a hundred-5% = ninety 5%)self belief. The serious fee of chi-sq. is to be desperate on the muse of the stages of freedom and point of value. for a similar tiers of freedom the serious fee would be diverse at diverse stages of value.

Answer 4

as above