Loading...

Statistical Consulting

//Statistical Consulting
Statistical Consulting 2020-04-09T12:44:11+00:00

AMSTAT’s Expertise

AMSTAT has become nationally recognized for providing data management and statistical analysis. Hundreds of thousands of successful clients cite these reasons for choosing to work with AMSTAT:

  • All of our principals have Ph.D. in statistics at leading universities including Harvard, Stanford, and Columbia.
  • They include nationally renowned scholars who are also talented professors.
  • They have extensive backgrounds in statistics and biostatistics and over 100 years of practical experience in quantitative methods.
  • They are experts in statistical analysis such as t-test, ANOVA, traditional regression, logistic regression, MANOVA, factor analysis, cluster analysis, survival analysis, time series analysis, canonical correlations, discriminant analysis, structural equation modeling, hierarchical linear modeling, and path analysis.
  • They are experts in statistical programming languages such as SAS, SPSS, STATA, HLM, Mplus, R, and Access.
  • Our fees usually pale in comparison to the savings and/or additional profits that our work produces for our clients.
  • Over 90% of our clients request our assistance more than once, as our clients are almost universally happy with our different brand of consulting.
  • We are more reasonably priced than most other consultants offering statistical consulting.
  • We offer personalized, comprehensive, and friendly support during and after your consultation with us.
  • We offer ultra-fast turnaround times, often completing sections within 4-5 business days.
  • We are members in good standing of the Statistical Consulting section of the American Statistical Association.

Our Services

Use big data to make informed decisions

We are happy to provide the help you need at any or all of the following steps in earning the data-based answers you request:

  • Establishing and operationalizing your hypotheses and research questions
  • Providing ample instruction on the methods used
  • Inputting, organizing, and cleaning the data
  • Implementing the statistical analyses
  • Testing reliability (such as Cronbach’s alpha, test-retest reliability, split-half reliability, and inter-rater reliability) and validity (such as content validity, construct validity, criterion validity, internal validity, and external validity)
  • Writing up all results, including APA tables and figures
  • Providing syntax and raw output file
  • Explaining the results
  • Allowing unlimited e-mail and phone support to ensure that you completely understand the results of the analysis
  • Conducting two rounds of incidental statistics (i.e., if you would like additional statistics)
  • Preparing an effective PowerPoint Presentation.

AMSTAT is dedicated to detecting and correcting corrupt or inaccurate records from a record set, table, or database. The process of data cleaning includes data auditing, workflow specification, workflow execution, post-processing, and controlling. We can use popular methods. Those include parsing, data transformation, duplicate elimination, and statistical methods.

By analyzing the data using the values of mean, standard deviation, range, and clustering algorithms, we can find values that are unexpected and thus erroneous. We can examine any standardized residual greater than about 3 in absolute value, Hat element greater than 3p/n (p=k+1, k degrees of freedom), a Cook’s distance > 1, and Mahalanobis’s distance for case. We run Outlier Analysis such as a run-sequence plot,  a scatter plot, a histogram, and a box plot.

We can test reliability (such as Cronbach’s alpha, test-retest reliability, split-half reliability, and inter-rater reliability) and validity (such as content validity, construct validity, criterion validity, internal validity, and external validity).

Advanced analytics optimizes your supply chain.

We can design and perform the required statistical analyses.  Here is a sample of some of the analytical tools with which we are familiar:

  • Correlation Analysis, T-test, Chi-square Test, Regression Analysis, Logistic Regression, Hierarchical Regression Analysis, Factor Analysis, Principal Components Analysis, One-way ANOVA/ANCOVA, One-way MANOVA/MANCOVA, Factorial ANOVA/ANCOVA, Repeated Measures ANOVA/ANCOVA, Repeated Measures MANOVA/MANCOVA, Nonparametric Test (Wilcoxon signed rank test, Friedman test, Kruskal-Wallis test, Mann-Whitney test, Spearman Rank Correlation), Structural Equation Modeling, Multilevel Structural Equation Modeling, Confirmatory Factor Analysis, Multilevel Confirmatory Factor Analysis, Exploratory Factor Analysis, Mediation Analysis, Moderation Analysis, Time Series Analysis, Spatial Time-series Modeling, Cluster Analysis, Cox Regression, Kaplan-Meier Survival Analysis, Trend Analysis, Sensitivity Analysis, Hierarchical Linear Modeling (HLM), Bayesian Analysis, Bayesian Cox Regression, Joint Hierarchical Bayesian Modeling, Latent Class Analysis, Longitudinal Growth Modeling, Mixed-Effects Regression Model, Meta-Analysis, Mixture Model, Linear Mixed Models, Predictive Modeling, Distribution Analysis (e.g., Lognormal, Weibull, Gamma), Decision Tree, Ensemble Analysis, De-identification, Interim Analysis, Item Analysis, Discriminant Analysis, Binomial Test, Heterogeneity Test, Multidimensional Scaling, Tau-U Analysis, and Advanced Statistical Analysis

We have expertise in virtually every statistical and qualitative software package, including but not limited to:

  • SAS, SPSS. Stata. HLM, Mplus, R, SPSS Amos, SPSS Modeler, Azure, Access, WinBUGS, Minitab, Match!3, Zview

Our leaders

Dr. David Fetterman
Dr. David FettermanAdvisory Board (Fetterman & Associates, President)
EDUCATION
Ph.D., Stanford University
Master’s Degree, Stanford University
Master’s Degree, Stanford University

EXPERIENCE

Stanford University, Professor
School of Medicine, Stanford University, Director of Evaluation

HONORS (selected)

American Educational Research Association Research on Evaluation Distinguished Scholar Award, 2013
Lazarsfield Award for Contributions to Evaluation Theory, American Evaluation Association, 2000
Mensa Education and Research Foundation Award for Excellence, 1990.
Myrdal Award for Cumulative Contributions to Evaluation Practice, American Evaluation Association, 1995
Outstanding Higher Education Professional, Neag School of Education, University of Connecticut, 2008
Who’s Who in America, 1990, 1995-1996, 1999, 2008-2012

PROJECTS (selected)

$15 Million Digital Divide Project, Hewlett-Packard Philanthropy and Education
W. K. Kellogg Foundation
Case Method, Columbia School of Journalism
Digital Media Center, Knight Foundation
Arkansas Department of Education
One East Palo Alto. City Revitalization Project Hewlett Foundation

BOOKS (selected – over 100)

Fetterman, D.M., Rodriguez-Campos, L., and Zukoski, A. (2017). Collaborative, Participatory, and Empowerment Evaluation: Stakeholder Involvement Approaches. New York: Guilford Publications.
Fetterman, D.M., Kaftarian, S., and Wandersman, A. (2015). Empowerment Evaluation: Knowledge and Tools for Self-assessment, Evaluation Capacity Building, and Accountability. Thousand Oaks, CA: Sage.
Fetterman, D.M. (2013). Empowerment Evaluation in the Digital Villages: Hewlett-Packard’s $15 Million Race Toward Social Justice. Stanford: Stanford University Press.
Fetterman, D.M. (2010). Ethnography: Step by Step (Third Edition). Thousand Oaks, CA: Sage.

CHAPTERS AND ARTICLES (selected – over 100)

Fetterman, D.M. (in press). Empowerment Evaluation. The SAGE Encyclopedia of Educational Research, Measurement, and Evaluation. Thousand Oaks, CA: Sage.
Mansh, M., White, W., Gee-Tong, L., Lunn, M., Obedin-Maliver, J., Stewart, L., Goldsmith, E., Brenman, S., Tran, E., Wells, M., Fetterman, D.M., Garcia, G. (2015). Sexual and Gender Minority Identity Disclosure During Undergraduate Medical Education: “In the Closet” in Medical School. Academic Medicine, 90(5),634-644.
Wang JY, Lin H, Lewis PY, Fetterman DM, Gesundheit N. (2015). Is a career in medicine the right choice? The impact of a physician shadowing program on undergraduate premedical students. Acad Med. May, 90(5),629-33.
White, W., Brenman, S., Paradis, E., Goldsmith, E.S., Lunn, M.R., Obedin-Maliver, J., Stewart, L., Tran, E., Wells, M., Chamberlain, L.J., Fetterman, D.M., and Garcia, G. (2015). Lesbian, Gay, Bisexual, and Transgender Patient Care: Medical Students’ Preparedness and Comfort. Teaching and Learning in Medicine: An International Journal. 27(30), 254-263

RADIO INTERVIEWS (selected)

Empowerment Evaluation in the Digital Villages (book), KAZI FM, Houston, Texas, March 29, 2013.
Chronicle of Philanthropy article about evaluation and nonprofit survival (Chronicle), WPFM FM, Washington, D.C. March 25, 2013.
Empowerment Evaluation in the Digital Villages (book), Kathryn Zox Show, March 13, 2013.
Empowerment Evaluation in the Digital Villages (book), Money Matters Network, Host Stu Taylor, January 28, 2013.
Empowerment Evaluation in the Digital Villages (book), WKXL-AM, Concord, New Hampshire, Host Bill Kearney, January 17, 2013.
Empowerment Evaluation in the Digital Villages (book), WPHM-AM Detroit, Host Paul Miller, January 14, 2013.

Dr. Ann E. K. Um
Dr. Ann E. K. UmPresident and CEO
EDUCATION

Doctorate Degree, Columbia University
Master’s Degree, Stanford University
Master’s Degree, Columbia University

EXPERIENCE

Harvard Medical School, DFCI, Research Data Manager
Harvard Medical School, Brigham and Women’s Hospital, Data Manager
The University of Texas, Assistant Professor
Harvard University, Harvard Innovation Labs, Experfy, Instructor
Johns Hopkins Hospital, Advisor
United States Environmental Protection Agency, Human Studies Review Board

PUBLICATIONS (selected)

Autonomy Support, Self-Concept, and Mathematics Performance: A Structural Equation Analysis. Saarbrucken, Germany: VDM Verlag, 2010.
Motivation and Mathematics Achievement: A Structural Equation Analysis, Saarbrucken. Saarbrucken, Germany: VDM Verlag, 2008.
Motivation and Mathematics Performance: A Structural Equation Analysis. Michigan, Ann Arbor: ProQuest, 2006.
Motivation and Mathematics Performance: A Structural Equation Analysis (doctoral dissertation). Columbia University, New York, 2005.

PRESENTATIONS (selected)

Motivation and Mathematics Performance: A Structural Equation Analysis, National Council on Measurement in Education, Montreal, Quebec, Canada, 2005.
Comparing Eighth Grade Diagnostic Test Results for Korean and American Students, National Council on Measurement in Education, Chicago, Illinois, 2003.

LEARN MORE about our PhD level experts

This list shows a sample of the past clients.

Explore more studies

Read the latest posts

Relative Risk of Lung Cancer 

March 23rd, 2020|2 Comments

The purpose of this quantitative study was to compare the difference in relative risk (RR) of lung cancer between the intervention and control groups. The hypothesis was: H1: The intervention group will have an increase in relative [...]

Banking Fees & Financial Performance

March 20th, 2020|1 Comment

The purpose of the quantitative study was to measure the impact of banking fees on financial performance. The hypothesis was the following: H1: Banking fees significantly affect financial performance. We performed a regression analysis [...]

Internet Use & Perceived Performance

March 17th, 2020|1 Comment

The purpose of the quantitative study was to measure the impact of internet use on perceived performance in retail and professional service firms and age differences in internet usage. The hypotheses being tested were: H1: [...]

see the blog posts

“I have worked closely with AMSTAT on the data analysis/results of two research projects so feel as though I am knowledgeable about their expertise. On all accounts, the company provided me with reliable statistical analysis and results that I could translate into publishable format. They are conscientious experts who provide keen insights into appropriate statistical analysis given various data sets. I highly recommend them for your statistical support needs!”

Dr. Vincent Salyers, Dean and Professor, Gonzaga University

“I have worked closely with AMSTAT on the data analysis/results of two research projects so feel as though I am knowledgeable about their expertise. On all accounts, the company provided me with reliable statistical analysis and results that I could translate into publishable format. They are conscientious experts who provide keen insights into appropriate statistical analysis given various data sets. I highly recommend them for your statistical support needs!”

Dr. Raj Singhal, MD., Research Director of Pain Management, Phoenix Children's Hospital

“We have been very pleased with working with AMSTAT. The service was custom tailored and on time completion. The statistical report was detailed with excellent graphics. The cost of the services was affordable for a start-up company such as EndoLogic! Dr. Ann is very detail oriented and likes to know the project thoroughly that is being analyzed.”

Dr. Zamir S. Brelvi, MD, PhD., CEO, EndoLogic

“I am a physician and was in need of statistical analysis of research data. I found AMSTAT on online search. Dr. Ann called me and explained the process involved in data analysis. Dr. Ann was always very prompt, helpful, intelligent and took time explaining the various tests used in conducting data analysis. Thank you so much!! I look forward to working with you in the future.”

Dr. Haritha Boppana, MD, D, Prisma Health Greenville Memorial Hospital

“Extremely professional. Attends to your project needs with skills and expertise. Pays attention to all details. Offers suggestions and recommendation for better and more effective use of your data. Creative and sincere. Thank you very much.”

Prof. Mohamed Toufic El Hussein, Mount Royal University, Mount Royal University

“Extremely professional. Attends to your project needs with skills and expertise. Pays attention to all details. Offers suggestions and recommendation for better and more effective use of your data. Creative and sincere. Thank you very much.”

Dr. Nancy Allen, PhD., Curriculum and Technology Consultant,
Check out our 5-star Reviews

Pricing that gives you flexibility and control

learn more about pricing and get $200 credit by ordering now

Get $200 Credit by Calling Us Now At (301) 800-0038 

Join The 300,000+ Satisfied Customers Today

If You Want To Set Up A Specific Time To Discuss Your Project, Schedule A Free Consultation! 

contact us now!
Schedule a Free Consultation