10.5 quantitative investigations of variation Flashcards
1
Q
what is interspecific variation?
A
variation between different species
2
Q
what is intraspecific variation?
A
variation between organisms of the same species
3
Q
why might the measurements not be representative?
A
- sampling may be biased
- by chance
4
Q
how to minimise chance?
A
- using a larger sample size
- use statistical test to see if the results are down to chance or not
5
Q
what does a large standard deviation mean?
A
lots of variety
6
Q
what does a small standard deviation?
A
little variety
7
Q
how to minimise bias?
A
eliminate any human involvement in choosing the sample by using a random number generator for coordinates in a grid
