Here are our weekly discussion topics:
Welcome! In this week we'll be celebrating the returning of StatsChats and planning the rest of the semester.
Martin Genova will discuss his plans to publish his undergraduate research project. His work involves generating regression analysis of environmental factors influencing the establishments of native and invasive species in tussocks and floating islands. Martin has done preliminary analysis and visualizations in R, and wants to have feedback on that.
Please mind the change of location for this time only!!!!!!: DeLaMare Library basement (Data & GIS Depot)
Uriel Cholula-Rivera will talk about the results of two years of a deficit irrigation experiment in alfalfa. The main objective was to assess the effects of deficit irrigation on alfalfa dry yield, crop water productivity, and quality. The statistical analysis was done following two approaches: considering the seasonal dry yield and crop water productivity and considering the cuts as repeated measures.
(Postponed, snow day)
Mia Kirk will present her research examining the relationship between gambling and substance use in Nevada. She is using data from the Nevada Behavioral Risk Factor Surveillance System, an annual state-wide public health survey. She has done preliminary analysis in R and would like feedback on next steps.
Brian Morra has data that were collected to measure the impact of postfire seeding on soil properties. The data have 5 levels of nesting and are replicated through time. He has some guesses about how to handle these data, but it would be helpful to get some input from others about defining models, and interpreting interactions.
March 20 Spring Break (No discussion)
Tory Taylor will present two two streams of her research. One looks at how the quality of online surveys (e.g., whether items contain ambiguity, scales are validated, formatting issues exist, etc.) affects responses. The second tests whether a follower's satisfaction with the organization (perceived organizational support, perceived opportunity to learn and grow, and perceived fit with the organization) mediates the effect of supervisor undermining on quiet quitting (normative commitment and organizational citizenship behavior.) She would like feedback on experimental design and statistical analysis.
Perry Williams will lead a special session on ways to presenting linear and non linear models for publications and presentations.
Bryant Nagelson analyses the factors that contributed to old-growth giant sequoia mortality within the Mountain Home grove during the Castle Fire in 2020. He is considering using a random forest approach to rank the importance of tree-level characteristics, topographic variables, and management history classifications in determining survival of trees during the fire. He'd like feedback on his analyses.