Should you calculate the mean or count and divide by area?
You know when you get those questions like 'describe how the biologist should have used the quadrats in his investigation' and so you will go on to write about random sampling (or any other kind), in the mark scheme it is always either 'calculate the mean' or 'count and divide by area', how do you know which one to say and can someone explain the difference between the two?
Original post by LadyScheherazade
You know when you get those questions like 'describe how the biologist should have used the quadrats in his investigation' and so you will go on to write about random sampling (or any other kind), in the mark scheme it is always either 'calculate the mean' or 'count and divide by area', how do you know which one to say and can someone explain the difference between the two?
In this example the mean would be the average number of things in a quadrat. So if they are looking for bugs say, and they place the quadrat 10 times, what is the mean number of bugs that are found in a quadrat.
Count and divide by area is exactly that. Within each quadrat how many bugs would be found per unit area. I.e. the number of bugs in a quadrat divided by the area of the quadrat.
If both are in the Mark scheme then either should be fine. You could always hedge your bets and write both to get the mean number of bugs per unit area.
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