AMSTAT’s Expertise

AMSTAT has become nationally recognized for providing its consulting services to tens of thousands of students. Our successful students cite these reasons for choosing to work with AMSTAT.

All of our principals have PhDs at leading universities, including Harvard, Stanford, and Columbia. They have extensive backgrounds in statistics and biostatistics and over 100 years of practical experience in quantitative and qualitative methods. They are experts in statistical programming languages such as SPSS, SAS, Stata, R, HLM, Mplus, SPSS Amos, SPSS Modeler, Azure, JMP, WinBUGS, Minitab, Match!3, and Access. They are experts in using qualitative data analysis software such as NVivo, Nud*ist, HyperResearch, and Atlas. They are experts in statistical analysis. We specialize in customizing our assistance for our clients to help them receive approval quickly and efficiently. Our clients come to us from around the world for our expertise and attention to detail. We regularly work with doctoral candidates. Thus, we have a clear understanding of the specific challenges posed by the dissertation writing process. Whether you are finalizing your topic and research design, or need extra support completing your qualitative or statistical analysis, we can absolutely assist you at every stage of your dissertation to ensure you have a compelling study that is ready for approval and publication.

We are confident that you will be satisfied with our consultants and overall experience with our dissertation consulting service. We do not share your information with third-parties. We do use industry-leading security practices to keep your data safe. The latest encryption technologies allow providing the best protection of the information. We are more reasonably priced than most other companies. We offer ultra-fast turnaround times, often completing sections within 4-6 business days. We offer personalized, comprehensive, and friendly support. We are highly recommended by the Association for Support of Graduate Students.

Service Guarantees


Contact us anytime via any method. We’ll have a qualified American Client Success Specialist ready to help you.


All papers are tailored to your instructions and are unique. Our team ensures it’s original by using anti-plagiarism tools like Turnitin and others.


Data Management and Test Results for Reliability and Validity

AMSTAT is dedicated to detecting and correcting corrupt or inaccurate records from a recordset, 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. 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).

Statistical Analysis

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 (SEM), Multilevel SEM, Confirmatory Factor Analysis (CFA), Multilevel CFA, 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, Negative Binomial Regression, and Advanced Statistical Analysis

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

  • SPSS, SAS, Stata, HLM, Mplus, R, SPSS Amos, SPSS Modeler, Azure, JMP, WinBUGS, Minitab, Match!3, Access, NVivo, Nud*ist, HyperResearch, and Atlas.

Qualitative Analysis

Establishing and operationalizing your research questions

Providing ample instruction on the methods used

Coding, thematizing, and providing reporting of findings for a study

Identifying themes and sub-themes

Coding documents in order to count the word-phrase clusters

Creating a word-phrase cluster in the form of classified conceptual categories for the purpose of counting those conceptually categorized words or phrases

Addressing specific subthemes that the thematic constructs have

Providing numerical frequencies and standard scores for each master theme and sub-theme

Writing up all results, including APA tables and figures

Explaining the results

Allowing unlimited e-mail and phone support to ensure that you completely understand the results of the analysis

Preparing an effective PowerPoint master theme and sub-theme

Dissertation Consulting

We provide highly customized writing services. Our experience enables us to write your dissertation’s introduction chapter, assisting with:

  • Stating the research problem.
  • Stating the purpose of the study
  • Stating the research questions
  • Providing a concise rationale for the selection of the design and tradition
  • Identifying potential contributions of the study that advance knowledge in the discipline.

Our experience enables us to write your dissertation’s literature review chapter, assisting with:

  • Identifying the theory or theories and provide the origin or source.
  • Describing studies related to the constructs of interest and chosen methodology and methods that are consistent with the scope of the study.
  • Describing ways researchers in the discipline have approached the problem and the strengths and weaknesses inherent in their approaches.
  • Justifying from the literature the rationale for selection of the variables or concepts.
  • Reviewing and synthesizing studies related to the key concepts and/or phenomena under investigation to produce a description of what is known about them, what is controversial, and what remains to be studied.
  • Reviewing and synthesizing studies related to the research questions and why the approach selected is meaningful.

Our experience enables us to write your dissertation’s methods section, assisting with:

  • Stating the study variables (e.g., independent, dependent), as appropriate.
  • Identifying and justifying the type of sampling strategy.
  • Using a power analysis to determine sample size and include: Justification for the effect size, alpha level, and power level chosen.
  • Describing recruiting procedures and particular demographic information that will be collected.
  • For published instruments providing:
    Name of developer(s) and year of publication.
    Appropriateness to the current study.
    Published reliability and validity values relevant to their use in the study.
  • For all researcher instruments providing:
    Basis for development (literature sources or other bases for development)
    Plan to provide evidence for reliability (e.g., internal consistency and test/retest) and validity (e.g., predictive and construct validity).
  • Identifying software used for analyses.
  • Providing the explanation of data cleaning and screening procedures.
  • Describing in detail the analysis plan, including the elements below including:
    Statistical tests that will be used to test the hypothesis (es).
    Procedures used to account for multiple statistical tests, as appropriate.
    The rationale for inclusion of potential covariates and/or confounding variables.
    How results will be interpreted.

Our experience enables us to write your dissertation’s results chapter, assisting with:

  • Reporting descriptive statistics that appropriately characterize the sample.
  • Evaluating statistical assumptions as appropriate to the study (quantitative).
  • Reporting statistical analysis findings, organized by hypotheses – We can report any additional statistical tests of hypotheses that emerged from the analysis of main hypotheses (quantitative).

Our experience enables us to write your dissertation’s discussion chapter, assisting with:

  • Describing in what ways findings confirm, disconfirm, or extend knowledge in the discipline by comparing them with what has been found in the peer-reviewed literature described in chapter 2.
  • Describing the limitations to trustworthiness that arose from the execution of the study.
  • Describing recommendations for further research that are grounded in the strengths and limitations of the current study. We can ensure recommendations do not exceed study boundaries.
  • Describing the potential impact for positive social change at the appropriate level (individual, family, organizational, and societal/policy).

This list shows a sample of the past clients.

Impact Stories

Publish Dissertations

Helped numerous students publish dissertations.

Publish Journals

Helped numerous students publish journals.


Helped numerous students get PhDs.

Master’s degree

Helped numerous students get master’s degrees.

16,000+ doctoral students served

16,000+ doctoral students served

4,000+ master's students served

4,000+ master's students served

Examples of our work

Banking Fees & Financial Performance

September 14th, 2020|1 Comment

We measured the impact of banking fees on financial performance. The hypothesis was as follows: H1: Banking fees significantly affect financial performance. We performed a regression analysis to examine the hypothesis. Banking fees significantly and positively affected [...]

Leadership Behavior

September 14th, 2020|2 Comments

We examined leadership behavior and successful integration of technology in high schools. The research question was as follows: RQ1: What leadership behavior supports successful integration of technology in high schools? We performed a thematic analysis [...]

Managers’ Spirituality

September 13th, 2020|0 Comments

We examined managers’ spirituality and unethical behavior. The research question was as follows: RQ1:   How does managers’ spirituality play a role in mitigating unethical behavior? The common theme was as follows: Managers’ spirituality plays a [...]

Internet Use & Perceived Performance

September 13th, 2020|1 Comment

We measured the impact of internet use on perceived performance in technology companies and age differences in internet usage. The hypotheses were as follows: H1:  Internet use significantly affects perceived performance in technology companies. [...]

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Featured Client Success Stories

“I am very impressed by the level of professionalism that AMSTAT has provided for my educational research. I have been working with the company for the last few years, and all editing projects were completed in a timely manner with high-quality results. The friendliness and the customer service are excellent, I highly recommend!” – Zenovia Bryant, 5-star Trustpilot Review

“AMSTAT was recommended to me to edit my dissertation. Their work significantly improved the quality and readability of my writing. While working with them, I found them to be efficient, and their accommodating way of working gave me great peace of mind. The result was a high-quality dissertation and a distinction for my PhD. I would always recommend AMSTAT to work their magic on your dissertation.” – Vicki Andrew, 5-star Trustpilot Review

“This is one of the best services that helped me do my dissertation. They provide completed work on time, and quality is what they produce. I recommend this service to all other students who may be looking for writing help. If you want a top-quality paper to be presented to you, simply work with this service. It is one of the best agencies I have worked with so far, and therefore, you do not have to panic. Try it out and enjoy the results.” – Rose Zimmerman, 5-star Trustpilot Review

“We were delighted with AMSTAT as an editor, statistician, advisor, and companion. We can highly recommend their work ethic. With their perfectionist approach, they resolved my fears of writing my dissertation, and I can assure everyone who contemplates working with them: You will be very happy with the final product. It is wonderful to work with them who are so consistently reliable, who have a natural interest and in-depth knowledge of the subject matter, and above all who have a way with words. They are very talented.” Katherine Doyle, 5-star Manta Review

“I would highly recommend Amstat! Amazing customer service! I personally worked with Dr. Ann Um who was very knowledgeable! She answered all my questions in a timely manner. The service I requested resulted in a fast turn around! You won’t be disappointed!-Sherena Samuel, 5-star Facebook Review

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