Topic 4.7 Investigating Biodiversity Flashcards
(6 cards)
1
Q
What is random sampling and why is it important?
A
2
Q
How can quadrats be used to take a random sample?
A
3
Q
What does standard deviation tell us?
A
The variation of values in a sample about the mean
4
Q
What does low/ high standard deviation show?
A
Low - little variation in the sample
High - lots of variation in the sample
5
Q
What can we tell from error bars of standard deviation?
A
If bars do not overlap:
Difference is significant/ not due to chance as bars do not overlap
2 marks
6
Q
Why do we use standard deviation?
A
To reduce the effect of anomalies
To indicate consistency of data
