Question

You are hoping to get an estimate of the number of birch trees in a local park. You have a satellite image of the park, and plan to use quadrat sampling to estimate the number of birch trees in the park. The park is 1000m by 1000m. Describe how you can set up your quadrat and how you would then use the data you collect to estimate the number of trees in the entire park. (Include a sample calculation).

Answer 1

solution:

given data:

For this estimation of tree counting in the whole park we can use the quadrant sampling method like this-

In this qudrant each small squarew is 100 m both in horizontal and vertically. And there are 10 small square both in horizontally and verically.So the length becomes 1000m X 1000m.

Now, for each birch tree in the square just put a simple dot so the count will be very easy.

For example- In this sample quadrant in-

A1 3 dot which means 3 birch tree

A2- 2 tree

A3- 2 tree

A4- 3 tree

A5- 2 tree

A6- 2 tree

A7- 3 tree  

A8- 3 tree

A9- 2 tree

A10- 1 tree

Like this in the B there are-

B1- 1 tree

B2- 1 tree

B3- 1 tree

B4- 2 tree and so on..

and by this step by step the number of trees around the park is calculated and the the dots are put in the small square which represents the tree count.

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