## Ecological MethodologyThis coherent text translates the methods of statisticians into "ecological English" so that students may readily apply these methods to the real world. |

### From inside the book

Results 1-3 of 89

Large samples When approximately 500 or more individuals are sampled to

estimate p1 and an equally large number to estimate p3, you should use the

normal approximation: Wí [

**variance**(s))] + N3 [

**variance**(p,)]

**Variance**(W1) = (f1 -

p2)” ...

7.1.3

**Variances**from a Normal Distribution In some cases an ecologist may wish

to estimate the

**variance**of a given measurement to a specified level of precision.

How can you estimate how large a sample you should take? First, you must ...

Observed

**variance**of stratum h (equation [8.3]) na = Sample size in stratum h f, -

Sampling fraction in stratum h = n/NA The last term in this summation is the finite

population correction, and it can be ignored if you are sampling less that 5% of ...

### What people are saying - Write a review

### Other editions - View all

Ecological Methodology Charles J. Krebs,CHARLES L. KREBS,Professor of Zoology Charles J Krebs No preview available - 1999 |