Forum Home > Non-Gaming > General Discussion > Index diversity
[1]
Post Info Posted Reply

edge
Global Moderator
Posts: 1126
Index diversity
Posted: May 4, 2009, 12:48:45
Quoted Reply
Calling any biologist, please attempt this question from my A level mock test paper.

1074

Using the formula given, work out the index diversity

d = Index of diversity
N = total number of organisms of all species
n = total number of organisms of a particular species
Σ = Sum of

My working out came to d = 24*(23)/182

My answer came to 3.03, though my mark scheme i'm using said the answer is 3.21. Is it the mark scheme thats wrong, or is it my working out?

The more I revise, the less confident i get :sneaky2: :thumbdown:

Major kudos to anyone that could offer any help.

Xemnas
Global Moderator
Posts: 1686
Posted: May 4, 2009, 13:09:16
Quoted Reply
The Mark Scheme is wrong. the answer is 3.0329(with alot of other numbers)

I hope this helps a little Edge.

edge
Global Moderator
Posts: 1126
Posted: May 4, 2009, 16:40:26
Quoted Reply
Hooray! Thats what i got :) It does indeed help thanks for taking the time to help :D Why would my exam board, AQA, give me an incorrect mark scheme.. So close to the exams too :(

Milky
Member
Posts: 438
Posted: May 8, 2009, 17:40:39
Quoted Reply

Quote from edge:
Hooray! Thats what i got :) It does indeed help thanks for taking the time to help :D Why would my exam board, AQA, give me an incorrect mark scheme.. So close to the exams too :(


Because they want you to fail. Anyway, that was a mathematical question really, was it not?

I'm doing an A level in Physics and the textbook we have is a pile of crap - it has absolutely no helpful information in it whatsoever. It just goes on about the history of Physics instead of what's actually relevant and in the specification. Makes me angry. :@

So yeah, they don't want you to do well!

edge
Global Moderator
Posts: 1126
Posted: May 8, 2009, 19:29:42
Quoted Reply
We have the same for chemistry, the history behind it all and what not.. surely if i wanted to know that i'd have taken history...

but i have this feeling they want us to fail too
[1]
Forum Home > Non-Gaming > General Discussion > Index diversity