Lab 6

Question 1

2 Assumptions of statistical mechanisms that examine the occurance of the species within a set of samples are

Answer 1

1. The individuals of a species are randomly dispersed with respect to one another
2. These same individuals are randomly dispersed with respect to any environmental gradients/changes.

If these assumptions are true then the result, in terms of abundance, for a given species over a number of samples taken across some environmental gradient should be the same, i.e. the same number of individuals should be found in each sample.

Question 2

Frequency

Answer 2

total count

Question 3

Chi sq test is also known as

Answer 3

Goodness of fit test

Question 4

Small chance deviation

Answer 4

small x^2 value, high probability of occurance: p>0.05

Question 5

large non-random deviation

Answer 5

high x^2 value, low probability of occurance: p<0.05