Effect of Rancher’s Management Philosophy, Grazing Practices, and Personal Characteristics on Sustainability Indices for North Central Texas Rangeland Page: 79
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validation data for testing the model, and the remaining K- 1 subsamples are used as training
data. The number of folds selected (K) determine the number of times the cross-validation
process is repeaed (Moore, 2008).
Software provided by R version 12.13.0. package 'DAAG' and the function "CVlm"
perform K-fold cross-validation analysis (Maindonald, 2011). This function gives internal and
cross-validation measures of predictive accuracy for multiple linear regressions. Therefore, it
was used in all cross-validation statistical procedures in this study.
Non-Response Bias Survey
Using SPSS 18.0, non-respondents returning the non-response bias questionnaire were
evaluated for differences in demographics, grazing patterns, and source used to obtain
management information (Appendix B).
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Becker, Wayne. Effect of Rancher’s Management Philosophy, Grazing Practices, and Personal Characteristics on Sustainability Indices for North Central Texas Rangeland, dissertation, December 2011; Denton, Texas. (digital.library.unt.edu/ark:/67531/metadc103289/m1/90/: accessed January 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .