User: | Open Learning Faculty Member:
Below are the results from the sampling strategies:
Sampling Method | |||
Species | Systemic | Random | Haphazard |
Eastern Hemlock | Estimated- 376.0 | Estimated-429.2 | Estimated- 532.0 |
Actual-469.9 | Percentage Error-20% | Percentage Error-8.5% | Percentage error- 13.2% |
Sweet Birch | Estimated-136.0 | estimated-116.7 | Estimated-136.0 |
Actual-117.5 | Perctage Error-15.7% | Percentage error- .68% | Percentage error- 15.7% |
Yellow Birch | Estimated-100.0 | Estimated-120.8 | Estimated- 92.0 |
Actual-108.9 | Percentage error-8.17% | Percentage error-10.9 | Percentage error-15.5% |
Chestnut Oak | Estimated-88 | Estimated-79.2 | Estimated-88 |
Actual-87.5 | Percentage Error-.57% | Percentage Eroor-9.5% | Percentage error-.57% |
Red Maple | Estimated-80 | Estimated-100 | Estimated-84 |
Actual-118.9 | Percentage Error-32.7% | Percentage Eroor-15.9% | Percentage error-29.4% |
Stripped Maple | Estimated-0 | Estimated-45.8 | Estimated-20 |
Actual-17.5 | Percentage Error-100% | Percentage error- 161.7% | Percentage error-14.3% |
White Pine | Estimated-0. | Estimated-4.2 | Estimated-8.0 |
Actual 8.4 | Percentage Error-100% | Percentage Error- 50% | Percentage Error-4.8 |
The most accurate sampling technique for the most common species, the Eastern Hemlock, was the random sampling. The error percentage is roughly half that of the other techniques used. For the rarest species, the white pine, haphazard was the most accurate. The most efficient sampling technique in terms of time was systemic which took 12 hours and 34 minutes to complete. The others were not far behind that with random taking 12 hours and 48 minutes and haphazard taking 13 hours and 8 minutes to complete. My data showed that the abundance of trees, in general, impacted the accuracy of all methods. The less dense the trees, the more likely it is to have variations in the data. Twenty four points of sampling is not enough for this location. The trees spread out in a such a way that the results can be misleading. One area may have way more of one type of tree then other locations. To get a more accurate reading more sampling is needed and spread out in a way that all types of trees can be accounted for.
The table does not fully fit in your post and sometimes better to make your own table so you can design it to look good in your post if you want to include all the data .