. A primer on stand and forest inventory designs. Forests and forestry Mensuration; Forest surveys. Complete Enumeration Figure 11 shows the mapped results of a complete enu- meration. All trees were measured in the stand. Statistical Estimates—Stand 97 has a total volume of 1,425 ccf, or 19 ccf per acre. Cost Estimates—n = area of stand or 75 acres, i = 0 feet. L = 0 hours. D = [0 + 75(1 )]/8 - hours. F = 2(9) [0 + 75(1) + ] = $1,, or $ per acre. Discussion—The complete enumeration will serve as ground truth for summarizing the results obtained by the other options. Summ
. A primer on stand and forest inventory designs. Forests and forestry Mensuration; Forest surveys. Complete Enumeration Figure 11 shows the mapped results of a complete enu- meration. All trees were measured in the stand. Statistical Estimates—Stand 97 has a total volume of 1,425 ccf, or 19 ccf per acre. Cost Estimates—n = area of stand or 75 acres, i = 0 feet. L = 0 hours. D = [0 + 75(1 )]/8 - hours. F = 2(9) [0 + 75(1) + ] = $1,, or $ per acre. Discussion—The complete enumeration will serve as ground truth for summarizing the results obtained by the other options. Summary of Methods Table 4 shows the results of sampling stand 97 by the methods discussed. There is no sampling error for the complete enumeration because each stand in the popula- tion was sampled. There may be error within a stand, but for this discussion, we have chosen to ignore it (as do most introductory treatises). A sampling error for the subjective technique cannot be computed because the plots were not chosen randomly. A sampling error cannot be computed for the single plot because at least two samples or prior information are needed. Similarly, the 10-point cluster is considered a single sample so the variance for the stand cannot be estimated, although the variance for the plot can be and was computed. Statistical Estimates—A direct comparison is not possible because the data are replicated only once for each tech- nique. However, some general comments or observations can be made. As may be expected, the 10-point cluster design, being considered a single plot, had the least variation. Intuitively the systematic distribution should best represent the stand and the single plot or cluster sample should be the least representative. A systematically distributed sample usually encompasses more variation than does a randomly distrib- uted sample. This will usually be the case unless some cyclic variation in the population chances to coincide with the periodicity in th
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