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t to estimate the average age of trees in a stand. Determining some because one needs to count the tree rings on a core e tree. In general, though, the older the tree, the larger and diameter is easy to measure. The foresters measure of all 1132 trees and find that the population mean equals ien randomly select 120 trees for age measurement. meter, x Age, y Tree No. Diameter, x Age, y 12.0 125 11 5.7 61 11.4 119 12 8.0 80 7.9 83 13 10.3 114 9.0 85 14 12.0 147 10.5 99 15 9.2 122 7.9 117 16 8.5 106 7.3 69 17 7.0 82 10.2 133 18 10.7 88 11.7 154 19 9.3 97 11.3 168 20 8.2 99 scatterplot of y vs. I. e the populationm mean age of trees in the stand using imation and give an approximate standard error for your (b) using regression estimation. our estimates on your graph. How do they compare?

t to estimate the average age of trees in a stand. Determining some because one needs to count the tree rings on a core e tree. In general, though, the older the tree, the larger and diameter is easy to measure. The foresters measure of all 1132 trees and find that the population mean equals ien randomly select 120 trees for age measurement. meter, x Age, y Tree No. Diameter, x Age, y 12.0 125 11 5.7 61 11.4 119 12 8.0 80 7.9 83 13 10.3 114 9.0 85 14 12.0 147 10.5 99 15 9.2 122 7.9 117 16 8.5 106 7.3 69 17 7.0 82 10.2 133 18 10.7 88 11.7 154 19 9.3 97 11.3 168 20 8.2 99 scatterplot of y vs. I. e the populationm mean age of trees in the stand using imation and give an approximate standard error for your (b) using regression estimation. our estimates on your graph. How do they compare?

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Foresters want to estimate the average age of trees in a stand. Determining age is cumbersome because one needs to count the tree rings on a core taken form the tree. In general, though, the older the tree, the larger the diameter, and diameter is easy to measure. The foresters measure the diameter of all 1132 trees and find that the population mean equals 10.3. They then randomly select 120 trees for age measurement. Tree No. Diameter, x Age, y Tree No. Diameter, x Age, y 1 12.0 125 11 5.7 61 11.4 119 12 8.0 80 3 7.9 83 13 10.3 114 4 9.0 85 14 12.0 147 5 10.5 99 15 9.2 122 7.9 117 16 8.5 106 7 7.3 69 17 7.0 82 10.2 133 18 10.7 88 9. 11.7 154 19 9.3 97 10 11.3 168 20 8.2 99 (a) Draw a scatterplot of y vs. r. (b) Estimate the population mean age of trees in the stand using ratio estimation and give an approximate standard error for your estimate. (c) Repeat (b) using regression estimation. (d) Label your estimates on your graph. How do they compare?
Transcribed Image Text:Foresters want to estimate the average age of trees in a stand. Determining age is cumbersome because one needs to count the tree rings on a core taken form the tree. In general, though, the older the tree, the larger the diameter, and diameter is easy to measure. The foresters measure the diameter of all 1132 trees and find that the population mean equals 10.3. They then randomly select 120 trees for age measurement. Tree No. Diameter, x Age, y Tree No. Diameter, x Age, y 1 12.0 125 11 5.7 61 11.4 119 12 8.0 80 3 7.9 83 13 10.3 114 4 9.0 85 14 12.0 147 5 10.5 99 15 9.2 122 7.9 117 16 8.5 106 7 7.3 69 17 7.0 82 10.2 133 18 10.7 88 9. 11.7 154 19 9.3 97 10 11.3 168 20 8.2 99 (a) Draw a scatterplot of y vs. r. (b) Estimate the population mean age of trees in the stand using ratio estimation and give an approximate standard error for your estimate. (c) Repeat (b) using regression estimation. (d) Label your estimates on your graph. How do they compare?
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