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The average tree height for a heavily forested area is almost impossible to fully quantify. Statistical sampling approaches can be used to obtain a reliable estimate for this attribute, but even in those approaches the size of the required sample can be prohibitive, both in terms of time commitment and expense. Fortunately, the height of a tree is highly correlated with the more readily available diameter of the tree at breast height. This feature can be used quite effectively in conjunction with an RSS approach to reduce the number of trees for which we must obtain the actual tree height measurement in order to obtain a reliable estimate of the average tree height in the entire forest.
Platt, Evans, and Rathbun (1988) studied the composition and dynamics of an old-growth longleaf pine population on the Wade Tract in southern Thomas County, Georgia. They obtained a variety of measurements for the longleaf pine trees in this population. In Table 15.6, we present the full height in feet and the diameter at breast height in centimeters for 396 of the trees in their study.
Using the easily measured tree diameter at breast height as the auxiliary ranking variable and a set size of k = 6, obtain an RSS (without replacement in the sampling process) of size n = 24 trees from this population of 396 trees. Estimate the average tree height of the entire population of 396 trees using the measured heights for the 24 trees in the RSS.
dr. cawoods class is presented with a large bin that contains small plastic beads. the beads in the box are either
1. Obtain the test-statistic and p-value. Report the test-statistic with degrees of freedom and the p-value here. 2. Report and interpret a 95% confidence interval for the difference in the mean time to complete the maze between those in the presen..
Use the data set for math education and conduct an ANOVA to see if there are any statistically significant differences with respect to problem solving total for students who have different categories of the concept of learning by themes (colcateg)..
the manager of a video library would like the variance of the waiting times of the customers not to exceed 2.30
Does nature heal best? A contrast (optional). The researchers who carried out the study of healing in newts described in the previous exercise conjectured that healing is fastest under natural conditions. If this is true, the population mean for t..
Using a .05 level of significance, test the hypothesis that there is no difference between the starting annual salaries of public accountants and financial planners. What is your conclusion?
where x1 is the age, x2 is the elevation, x3 is the rainfall, x4 is the specific gravity, and Y is the tree's diameter, test the hypothesis that β2 = 0. That is, test the hypothesis that, given the other three factors, the elevation of the tree does ..
this problem set introduces you to the use of spss for analyzing data with one iv and more than one dv to investigate
Compare the grower's expected values for the three alternatives he has, considering the various possible loss scenarios for the burners and the sprinklers. Which alternative would you suggest the grower take? Why?
Determine if the null hypothesis should be rejected or retained based on the results
The largest value in a set of data is 160, and the smallest value is 70. If the resulting frequency distribution is to have six classes of equal width, what will be the class interval?
Prepare the journal entry for each transaction listed above. In your own words, explain the main differences between common and preferred stock.
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