+ Site Statistics
+ Resolve Accession
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
EurekaMag PDF Full Text Supply ServicePDF Full Text Supply Service
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
Submit PDF Full TextSubmit PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn
Follow on LinkedInFollow on Tumblr

+ Translate

Estimating weights when fitting linear regression models for tree volume

, : Estimating weights when fitting linear regression models for tree volume. Canadian Journal of Forest Research 23(8): 1725-1731

The method of weighted least squares can be used to achieve homogeneity of variance with linear regression that has a heterogeneous error structure. A weight function commonly used when constructing regression equations to predict tree volume is (1/D-i-2H-i)-k!1, where k-1 apprxeq 1.0-2.1. This paper examines the weight function (1/D-i-k!2H-i-k!3)-k!1 for modelling the error structure in two loblolly pine (Pinus taeda L.) data sets and one white oak (Quercus alba L.) data set. The weight function (1/D-i-2.3H-i-0.7)-k!1 is recommended for all three data sets, for which the K-1 values ranged from 1.80 to 2.07.

Order PDF Full Text


Click here to order any other PDF Full Text

Accession: 002373069

DOI: 10.1139/x93-216

PDF Full Text: Estimating weights when fitting linear regression models for tree volume

Submit PDF Full Text

No spam - Every submission is manually reviewed

Due to poor quality, we do not accept files from Researchgate

Submitted PDF Full Texts will always be free for everyone
(We only charge for PDFs that we need to acquire)

Select a PDF file:

Other references

San NuNu; Deaton, B. J., 1999: Feasibility of integrating sheep and crops with smallholder rubber production systems in Indonesia. Diversified production systems are considered important tools for stabilizing the income of smallholder rubber producers in Indonesia. Based on empirical data collected from smallholder rubber producers in the Nucleus Estate Smallholder (NES) deve...

Fowler, R.; Baldwin, A. H., 1942: Arms and anophelines, or the military significance of malaria. Australian Medical Journal, 2(1): 455-459

Wong, A.; Howes, A.P.; Parkinson, B.; Anupõld, T.; Samoson, A.; Holland, D.; Dupree, R., 2009: High-resolution 17O double-rotation NMR characterization of ring and non-ring oxygen in vitreous B2O3. The application of double rotation (DOR) NMR to crystalline materials (both inorganic and organic) has made tremendous strides in providing site-specific information about materials in recent years. However (17)O DOR has yet to demonstrate its pot...

Anonymous, 2016: Erratum. Journal of the Academy of Nutrition and Dietetics 116(6): 1036-1036

Pless, M.; Gambazzi, F.; Stillhart, P.; Lieb, T.; Brutsche, M., 2008: Induction chemotherapy followed by parenchyma-sparing surgery in medically inoperable NSCLC-results of a feasibility study. Feasibility trial to test the toxicity and outcome of three cycles of induction chemotherapy followed by limited surgery in medically inoperable early stage NSCLC patients. Thirteen patients with NSCLC (stages I-IIIB) with insufficient cardio-resp...

Andreas, S.; Schulz, H.; Volkert, J.; Dehoust, M.; Sehner, S.; Suling, A.; Ausín, B.; Canuto, A.; Crawford, M.; Da Ronch, C.; Grassi, L.; Hershkovitz, Y.; Muñoz, M.; Quirk, A.; Rotenstein, O.; Santos-Olmo, A.Belén.; Shalev, A.; Strehle, J.; Weber, K.; Wegscheider, K.; Wittchen, H-Ulrich.; Härter, M., 2016: Prevalence of mental disorders in elderly people: the European MentDis_ICF65+ study. Except for dementia and depression, little is known about common mental disorders in elderly people. To estimate current, 12-month and lifetime prevalence rates of mental disorders in different European and associated countries using a standardise...

Lewczuk, E.; Smolik, R., 1988: Effect of copper on the erythropoietic system and erythrocytes. Polski Tygodnik Lekarski 43(34): 1098-1101

Simkovitch, R.; Huppert, D., 2016: Excited-state proton transfer of weak photoacids adsorbed on biomaterials: 8-hydroxy-1,3,6-pyrenetrisulfonate on chitin and cellulose. Time-resolved and steady-state florescence measurements were used to study the photoprotolytic process of an adsorbed photoacid on cellulose and chitin. For that purpose we used the 8-hydroxy-1,3,6-pyrenetrisulfonate (HPTS) photoacid which transfe...

Van Valin, C. C., 1966: Persistence of 2,6-dichloro-benzonitrile in aquatic environments. In two experiments dichlobenil was added to aquatic systems, and the residue levels were followed for about 6 months. A granular formulation applied to a farm pond at 0.6 ppm produced highest residues in water and fish (mainly Lepomis macrochirus...

Deligny, C.; Cabre, P.; Thévenot, C.; Dubreuil, F.; Arfi, S., 2002: Peripheral facial paralysis in a patient infected with HTLV-1 virus. 2 case reports. Facial nerve palsy is a frequent situation of varying etiology and the former concept of frozen facial nerves is progressively being abandoned. The HTLV-1 virus, endemic to some tropical areas, is one of the most recent causes discovered. We prese...