Blog 4, Sampling Methods

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Mohn Mill, sampled 10 quadrants using haphaᴢard, Area method:  total time was 5 hr.s 20 minutes.  Red Maple was the highest frequency species, error rate with red maple frequency was 61.5%.

Mohn Mill, sampled 10 quadrants using random/systemic, Area method:  total time was 5 hr.s 19 minutes.  Red Maple was the highest frequency species, error rate with red maple frequency was 12.09%

*Random/systemic Area method was 1 minute faster and much more accurate of the two.                                     ______________________________________________________________

Mohn Mill,  10 samples using haphaᴢad, Distance method:  total times was 2 hr.s 0 minutes.  Red Maple was the highest frequency species, error rate with red maple frequency was 23.1%

Mohn Mill, 10 samples using random/systemic, Distance method:  total time was 2 hr.s 2 minutes.  Red Maple was the highest frequency species, error rate with red maple frequency was -9.9%.

*Random/systemic Distance method still had a higher accuracy but was 2 minutes longer of the two.

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At 30 quadrants, Mohn Mill, Area, Haphaᴢard method  had an error rate of -6.50%, measuring Red Maple frequency.

At 30 quadrants, Mohn Mill, Area, Random/Systemic method had an error rate of -2.198%., measuring Red Maple frequency.

At 30 samples, Mohn Mill, Distance, Haphaᴢard method had an error rate of 1.2%, measuring Red Maple frequency.

At 30 samples, Mohn Mill, Distance, Random/Systemic method had an error rate of -2.6%, measuring Red Maple frequency.

*Haphaᴢard Distance Method had the lowest error rate with Red Maple frequency at 1.2%, using 30 samples which seems unusual seeing that the Random/Systemic Area and Distance error rates were -2.198 and -2.6, quite similar and quite low.  You would have expected the Random/Systemic methods to have superior accuracy even with the larger sample areas.  But this was just one species and one variable, Red Maple frequency; more species, more variables, more quadrat, and more samples would be needed to draw more definite conclusions.

 

 

 

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