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What do the variables 'n' and 'N' mean in the Simpsons Diversity Index formula?"

SDI = 1 - En(n-1)/N(N-1)

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Final answer:

'n' represents the number of individuals belonging to a particular species or category, while 'N' represents the total number of individuals in the entire population or community.

Step-by-step explanation:

In the Simpson's Diversity Index formula, 'n' represents the number of individuals belonging to a particular species or category. It is the sum of the frequencies of each species or category. 'N' represents the total number of individuals in the entire population or community.

For example, if you are calculating the diversity of species in a forest, 'n' would be the sum of the number of individuals of each species, and 'N' would be the total number of individuals of all species combined.

The formula calculates the diversity by considering both the number of different species (n) and the total number of individuals (N) in the population or community.

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