Blog Post 4: Sampling Strategies

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The fastest technique was Distance: Haphazard which completed in a total of 11 minutes. The slowest was Area: Haphazard and Area random at 33 and 32 minutes each.

The most accurate method seemed to be Distance: Haphazard. Species that were found to be in high abundance seemed to have very large percent errors (300-900%).

Comparing the relative frequency of our sample to the actual value for the 2 most common and 2 rarest species, gave the following data:

Area: Haphazard:

Black Tupelo: 20 vs 4.2 = 376% error

Red Maple: 20.0 vs 35.0 = 42.85% error

White Oak: 20.0 vs 13.5 = 48.15% error

Chestnut Oak: 20.0 vs 10.8 = 85.19% error

Average error = 138.05%

33 minutes

Distance: Haphazard:

11 minutes:

Red Maple: 50 vs 35 = 42.86% error

White Hazel: 50 vs 13.8 = 262% error

Total % error: 0.6/1.8 = 66.67% error

Average: 123.78% error

Area: Random:

32 minutes

Eastern Hemlock: 20 vs 4.6 = 335% error

Chestnut Oak: 19.2 vs 9.4 = 104% error

Witch Hazel: 20 vs 13.8 = 45% error

Red Maple: 20 vs 35 = 43% error

Average = 131.75% error

Distance: Random:

12 minutes

White Oak: 25 vs 13.5 = 85% error

Witch Hazel: 25 vs 13.8 = 81% error

Red/Black Oaks: 25 vs  9.2 = 172% error

Sowny Juneberry: 25 vs 2.3 = 987% error

Average = 331.25% error

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