The Statistical Consulting Collaboratory at UC – Riverside Daniel R. Jeske, Director Department of Statistics Theodore Y

1. The Statistical Consulting Collaboratory at UC – Riverside Daniel R. Jeske, Director Department of Statistics Theodore Younglove, Manager August 3, 2004 • Topics Covered • The Mission at UCR • Our Staff • A Glimpse of Who We’ve Been Working With • Our Link to Graduate Student Training www.collaboratory.ucr.edu

2. Provide statistical support services to UCR faculty and students • Planning Experiments, Archiving Data • Statistical Analyses, Statistical Software Subject Matter Support • Help with Responses to Referees, Help with Proposal Writing • 2. Research collaborations with faculty and graduate students when new • statistical ideas, interpretations and approaches are needed • Extension of services and collaborations objectives to public service efforts, • with concentration on the greater Inland Empire area and various government • agencies • Enhance instructional effectiveness by facilitating “hands-on” consulting • experience for Statistics students, coordinating campus-wide • workshop opportunities, and providing fully outfitted computing and • information management laboratories. The Statistical Consulting Collaboratory at UC-Riverside www.collaboratory.ucr.edu

3. A Brief History of Statistical Consulting at UCR Initial Leadership for a Statistical Consulting Laboratory was from Department of Statistics – Beginning around 1994 with Prof. David Strauss, Emeritus Prof. Keh-Shin Lii Prof. Robert Beaver Service was unofficial, in a volunteer mode motivated by Labors of Love and a sense of Professional Responsibility. Idea conceived in 2001 for an Official Director of a Statistical Consulting Collaboratory with joint support from College of Natural and Agricultural Sciences, College of Humanities, Arts and Social Sciences and the Office of Computing and Communications. Funds were provided for a staff position (Manager) and a faculty position in the Department of Statistics (Director) to provide the leadership for upholding the reputation of what had already been established and to grow the initiative in both the on-campus and off-campus dimensions. www.collaboratory.ucr.edu

4. Our Staff Daniel Jeske, Director Ted Younglove, Manager Junmei Liu Grad Student RA Yang Yang Grad Student RA www.collaboratory.ucr.edu

5. Undergrad Student No Fee Submit Query A Question thru “Ask A Statistician” Handled thru Individual Faculty Participation Handled thru Statistics 293 under Guidance of Director Handled by GSRs Under direction of Manager or Director Collaboratory Project Funnel A Yes All consulting fees go to the support of the GSRs, equipment, travel costs, and supplies for the collaboratory. Yes No Class Project? No Client chooses between following options depending on time and cost constraints Zero cost, no promise for complete solution Increasing Hourly Rate, Decreasing Turn-Around-Time www.collaboratory.ucr.edu

6. Clients in the Statistical Collaboratory 2003 2004 Clients Served 9/1/2003 4/21/2004 Elapsed Time www.collaboratory.ucr.edu

7. A Profile of Our Clients During the 2003-2004 Academic Year Consulting Fees On-Campus Rate: $62/hour Off-Campus Rate: $105/hour Consulting revenues are 100% invested in supporting graduate students who work in the Collaboratory www.collaboratory.ucr.edu

8. Scope of Statistical Techniques • Repeated Measures Analysis • Sample Size Determination • Reliability Modeling with Preventive Maintenance • Split-plot ANOVA • Queuing analysis • Probit Regression • Contrasts in a Randomized Block Design • Principal Component Analysis • Binomial p confidence intervals • G2 test for equal Binomial p-values • Non-linear regression • Concordance Correlation • Bootstrap bias correction • Inter-rater reliability measures • Analysis of Covariance • Polytomous Regression • Hypothesis Testing with Ordered Alternatives • Sequential Hypothesis Testing • Mixed Model Inference Procedures • Estimation of Brownian Motion parameters • Multiple Comparison Procedures • Tolerance Intervals • Survival Analysis Project was Utilized in Statistical Consulting Class www.collaboratory.ucr.edu

9. Other Collaboratory Resources Help Desk Staffed TBD hours/week for assistance with walk-in questions about statistical software Statistical Computing Laboratory Free access to computer labs equipped with PCs running site licenses for Statistics packages (SAS, R/Splus, SPSS, Minitab, Stata, MatLab) and simulation software (OPNET). Instructional PC classrooms equipped with client-server software to broadcast teacher-to-student analysis demonstrations Sponsored Workshop Colloquium Series 2003 program included talks on GIS Systems and Social Network Analysis 2004 program: STATA workshop (completed), SAS Day (completed), Statistical Methods in Genetics (upcoming), Comparison/Contrast of Statistical SW packages (upcoming) www.collaboratory.ucr.edu

10. Survivor Functions With Preventive Maintenance March AFB Weibull (2,22.57) Lifetime Distribution Expected Life = 20 Years Smooth Curve: No Preventive Maintenance Preventive Maintenance at T=15.5 Years (Years) http://www.collaboratory.ucr.edu www.collaboratory.ucr.edu

11. Waiting Time Distribution for Alternative Number of Machines (Treadmill) UCR Student Recreational Center M=1 M=5 M=8 M=9 M=10 M=11 M=12 M=15 M=20 Current number Of machines, M = 10 Probability Wait Time > t Waiting Time (minutes), t www.collaboratory.ucr.edu

12. Level 2 Task 1 Level 2 Task 2 Polychotomous Regression for Scores on Two Writing Tasks Taken By Two Levels of Students La Sierra University Graduate Students Level 1 Task 1 Level 1 Task 2 www.collaboratory.ucr.edu

13. Bioassay Study of Four Fly Repellants Department of Entomology www.collaboratory.ucr.edu