Services
The Stochastic Group, Inc. offers a full range of statistical consulting, statistical computing, and survey research solutions. Whether you are just a student needing assistance in the analysis of data for your dissertation or a large corporation requiring help with the design and analysis of an industrial experiment to reduce manufacturing defects and increase profitability, The Stochastic Group, Inc. can help. Our expertise in statistical consulting, statistical programming, survey research design and analysis, combined with our superior business acumen allows us to provide the most accurate, efficient, and effective consulting to solve the data collection and data analysis problems facing you or your organization.
Our statistical analysis expertise and capabilities include, but are not limited to:
- General Hypothesis Testing
- Multiple Linear Regression Analysis
- Nonparametric Regression Analysis
- Logistic, Multinomial, Exponential, Poisson Regression Analysis
- Logistic Regressopm
- Multinomial Logistic Regression
- Poisson Regression
- Zero-inflated Regression
- Hurdle Models
- Negative Binomail Regression
- Exponential Regression
- Artificial Intelligence (AI) and Machine Learning Methods
- Supervised Learning Methods
- Unsupervised Methods
- Semi-Supervised Methods
- Reinforcement Methods
- Bayesian Methods
- Monte Carlo Simulation Methods
- Correlation Analysis
- Causal Inference and Quasi-experimental analysis
- Propensity Score Analysis
- Difference-in-Differences Analysis
- Interrupted Time Series Analysis
- Correspondence Analysis
- Conjoint Analysis
- Multidimensional Scaling
- Cluster Analysis
- Discriminant Analysis such as Nearest Neighbor and Canonical
- Decision Tree Analysis and Classification Methods such as CHAID and CART
- Time-Series Analyses (ARIMA, ARMAX, Spectral Analysis, Filtering, and Prophet Models, etc.)
- Longitudinal Data Analyses, Profiling, and Analysis of Panel Data
- Statistical Methods in Epidemiology, Public Health & Medicine
- Analysis of Variance (ANOVA) and Multivariate Analysis of Variance (MANOVA)
- Principal Components Analysis (PCA) and Factor Analysis (FA)
- General Nonparametric Analysis, such
- General Categorical Data Analysis such as Cross-Tabulation and Frequency Table Analysis
- Missing Data Analysis such as Hot-Deck and Multiple Imputation Methods
- Analysis of Massive Datasets (N > 1 billion or tens of thousands of variables)
- Complex Survey Sampling Techniques and Methods
- Complex Sample Survey Weighting Derivation
- Stratification, Clustering, and Raking/Post-stratification Methods
- Multi-stage and multi-phase sampling
- Small Area Estimation
Our survey design and analysis expertise and capabilities include, but are not limited to:
- Individual Question and Response Development
- Questionnaire Design and Testing
- Sample Design and Sample Frame Construction
- Complex Survey Sampling Techniques
- Survey Non-response Analysis
- Item Non-response Analysis
- General Questionnaire, Question, and Response Bias Analysis
- Web-based Survey Methodology
- Cognitive Interviewing Testing Techniques
- Computer Assisted Self-Interviewing (CASI), Computer Assisted Telephone Interviewing (CATI), Paper and Pencil Interviewing (PAPI), and Mobile Interviewing Data Collection.
- General Survey Methodology Expertise
The Stochastic Group, Inc. (TSG) is able to implement most of its analyses using commercial, off-the shelf (COTS) statistical software. In additional, TSC also has non-statistical-specific programming language knowledge and expertise.
Our survey design and analysis expertise and capabilities include, but are not limited to:
- SAS, including SAS BASE, SAS STAT, SAS/SQL, SAS/OR, SAS Macro, SAS ETS, SAS/IntrNet, SAS/AF, SAS Integration Technologies, SAS IML, SAS Enterprise Miner, SAS
- R
- Python
- Julia
- SPSS, including SPSS Statistics Base, SPSS Exact Tests, SPSS Complex Samples, SPSS Amos, and Clementine
- STATA
- S-PLUS (S+) by Insightful, Inc.
- The open source R language
- C++
- C#
- FORTRAN
- SUDAAN by Research Triangle Institute (RTI)
- Visual Basic (VB) and Visual Basic Script (VBScript)
- PHP
- Java and Javascript
- Perl
- SQL
Our company also uses a variety of software packages used to design and develop surveys. We have expertise with the following software for the development of surveys:
- Unicom Intelligence (formerly SPSS' mrInterview, mrStudio, mrTranslate, mrScan and the PAWS Data Collection Technologies), including mrScriptBasic survey programming
- Questionnaire Design System (QDS)
- SurveyMonkey
- Qualtrics
- Survey Gizmo
- Blaise