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Biostatistics PhD Student | Statistics, Math, and Code Made Simple
Apostolos S.

4.6 (13 ratings)

51 hours tutoring

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Hourly Rate: $40
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About Apostolos

Bio

As a dedicated educator with a Master’s degree in Statistics from North Carolina State University and as a current PhD student in Biostatistics, I bring both depth of expertise and years of teaching experience. I have over 8 years of combined experience tutoring mathematics and statistics, helping students from high school through graduate school succeed in subjects such as Algebra, Calculus, Probability, and advanced Statistics.

My teaching philosophy emphasizes creating a supportive and...

As a dedicated educator with a Master’s degree in Statistics from North Carolina State University and as a current PhD student in Biostatistics, I bring both depth of expertise and years of teaching experience. I have over 8 years of combined experience tutoring mathematics and statistics, helping students from high school through graduate school succeed in subjects such as Algebra, Calculus, Probability, and advanced Statistics.

My teaching philosophy emphasizes creating a supportive and engaging learning environment where students feel comfortable asking questions and can confidently tackle complex concepts at their own pace. I adapt my methods to each student’s learning style, aiming not only for immediate academic success but also for fostering a lasting appreciation for mathematics and statistics.

I’m fluent in R and Python and can assist with homework, exam prep, coding/debugging, and research projects. As a peer tutor, I held one-on-one, group, and review sessions for calculus, algebra, statistics, and other STEM courses. I also earned the College Reading & Learning Association’s (CRLA) International Tutor Training Lifetime Level II certification, reflecting my commitment to effective and ethical tutoring practices. My academic background in computational statistics and applied mathematics equips me with valuable analytical tools and a strong foundation in both introductory and advanced topics, as well as experience applying statistical methods to research and data analysis across the sciences.

Whether you’re preparing for an exam tomorrow or tackling a complex data analysis project, I specialize in clear explanations, step-by-step guidance, and quick-turnaround help. My goal is to make sure you not only get the right answers but also understand the underlying concepts.

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Education

Pennsylvania State University
Economics
North Carolina State Unniversity
Masters
University of Minnesota
Graduate Coursework

Policies

Schedule

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Approved Subjects

ADHD

ADHD

As both a tutor and someone with ADHD myself, I understand the unique challenges that come with staying focused and organized while learning. I use strategies that break down concepts into clear, manageable steps and build lessons around each student’s strengths. My approach is patient, flexible, and encouraging, designed to help students with ADHD build confidence and succeed academically while developing study skills that work for them.
Algebra 1

Algebra 1

With years of experience tutoring Algebra, Calculus, and related STEM courses, I’ve worked with students from high school through college. I emphasize building strong foundations and connecting math concepts to real-world applications. My goal is to help students gain both confidence and long-term problem-solving skills, whether preparing for an exam or strengthening core understanding.
Algebra 2

Algebra 2

With years of experience tutoring Algebra, Calculus, and related STEM courses, I’ve worked with students from high school through college. I emphasize building strong foundations and connecting math concepts to real-world applications. My goal is to help students gain both confidence and long-term problem-solving skills, whether preparing for an exam or strengthening core understanding.
Biostatistics

Biostatistics

I hold a Master’s degree in Statistics from NC State and am currently pursuing a PhD in Biostatistics. I have over 8 years of tutoring experience helping students succeed in statistics courses from introductory through graduate level. I can support you with topics such as probability, regression, hypothesis testing, experimental design, and applied data analysis. My teaching style is clear, patient, and adaptable, ensuring you not only solve problems but also understand the reasoning behind them.
C++

C++

In my research as a PhD student in Biostatistics, I regularly use C++ and Rcpp to accelerate statistical computing in Bayesian models and simulation studies. I can help you understand how to write efficient C++ functions, integrate them seamlessly into R with Rcpp, and apply them to real statistical problems such as MCMC sampling, hierarchical models, and simulation-based inference. My tutoring emphasizes both the practical coding skills needed to implement algorithms in C++ and the statistical reasoning behind them, so you gain confidence in applying these tools to coursework, research projects, or advanced data analysis.
Calculus

Calculus

With years of experience tutoring Algebra, Calculus, and related STEM courses, I’ve worked with students from high school through college. I emphasize building strong foundations and connecting math concepts to real-world applications. My goal is to help students gain both confidence and long-term problem-solving skills, whether preparing for an exam or strengthening core understanding.
Cybersecurity

Cybersecurity

With 3 years of professional experience in Federal IT, I help students and professionals strengthen their basic computer skills while developing practical cybersecurity awareness. I can guide you through essentials such as computer setup and troubleshooting, navigating operating systems (Windows/macOS), safe internet use, password management, data protection, and spotting phishing or social engineering attempts. My tutoring emphasizes hands-on practice and real-world examples so you feel confident using technology safely and effectively. Whether you’re new to computers, need help building tech confidence, or looking to improve your online safety, I provide clear, patient, and practical lessons tailored to your needs.
Data Analysis

Data Analysis

I hold a Master’s degree in Statistics from NC State and am currently pursuing a PhD in Biostatistics. I have over 8 years of tutoring experience helping students succeed in statistics courses from introductory through graduate level. I can support you with topics such as probability, regression, hypothesis testing, experimental design, and applied data analysis. My teaching style is clear, patient, and adaptable, ensuring you not only solve problems but also understand the reasoning behind them.
Data Science

Data Science

As a PhD student in Biostatistics with a Master’s degree in Statistics from NC State, I bring both the theoretical foundation and practical skills needed for modern data science. I can help with data wrangling, visualization, regression, classification, machine learning basics, and statistical modeling using tools such as R, Python, pandas, NumPy, ggplot2, and tidyverse. My experience includes guiding students through assignments, projects, and research involving real-world datasets and applied analysis. I emphasize not just coding but also understanding the statistical reasoning behind algorithms, so you can approach problems with confidence and clarity.
Econometrics

Econometrics

With a Master’s degree in Statistics from NC State and current PhD training in Biostatistics, I bring a strong foundation in both theory and applied methods. I can help with core econometrics topics such as linear regression, instrumental variables, simultaneous equations, time series models, panel data, maximum likelihood estimation, and hypothesis testing. I also provide guidance on applying econometric techniques in R, Python, Stata, and SPSS, ensuring that you not only complete assignments but also understand the intuition behind the methods. My tutoring emphasizes step-by-step explanations, clear interpretation of results, and hands-on coding practice, so you can confidently connect econometric theory to real-world data.
Epidemiology

Epidemiology

I have a strong background in biostatistics and public health, with a Master’s degree in Statistics from NC State and current PhD training in Biostatistics. I can help with core epidemiology topics such as study design, measures of disease frequency and association (incidence, prevalence, risk, odds ratios), bias and confounding, stratification and adjustment, and interpretation of public health research findings. I also provide guidance on analyzing data with R, Python, SPSS, or SAS, connecting methods to the underlying public health questions. My tutoring approach emphasizes clear explanations and practical applications, so students can confidently interpret research and apply concepts to real-world health challenges.
Greek

Greek

As a native Greek speaker, I provide tutoring in both modern Greek language and culture. I can help with conversational practice, grammar, reading, and writing, whether you are a complete beginner or working to refine your fluency. I adapt lessons to each student’s goals—whether that’s learning everyday phrases for travel, improving academic skills, or strengthening professional communication. My approach emphasizes clear explanations, practical examples, and real conversation practice, so students can build confidence and enjoy the process of learning Greek.
Information Technology

Information Technology

With 3 years of professional experience in Federal IT, I help students and professionals strengthen their basic computer skills while developing practical cybersecurity awareness. I can guide you through essentials such as computer setup and troubleshooting, navigating operating systems (Windows/macOS), safe internet use, password management, data protection, and spotting phishing or social engineering attempts. My tutoring emphasizes hands-on practice and real-world examples so you feel confident using technology safely and effectively. Whether you’re new to computers, need help building tech confidence, or looking to improve your online safety, I provide clear, patient, and practical lessons tailored to your needs.
Precalculus

Precalculus

With years of experience tutoring Algebra, Calculus, and related STEM courses, I’ve worked with students from high school through college. I emphasize building strong foundations and connecting math concepts to real-world applications. My goal is to help students gain both confidence and long-term problem-solving skills, whether preparing for an exam or strengthening core understanding.
Probability

Probability

I hold a Master’s degree in Statistics from NC State and am currently pursuing a PhD in Biostatistics. I have over 8 years of tutoring experience helping students succeed in statistics courses from introductory through graduate level. I can support you with topics such as probability, regression, hypothesis testing, experimental design, and applied data analysis. My teaching style is clear, patient, and adaptable, ensuring you not only solve problems but also understand the reasoning behind them.
R

R

I have extensive experience using R for statistical analysis, data visualization, and research projects. As both a tutor and a current PhD student in Biostatistics, I regularly use R for coursework, teaching, and applied data analysis. I can help you with topics such as data wrangling, regression modeling, simulation, and custom graphics using packages like tidyverse, ggplot2, and survival. Whether you’re just getting started with R or working on a more advanced project, I can guide you step by step and explain both the coding and statistical concepts behind the methods.
Statistics

Statistics

I hold a Master’s degree in Statistics from NC State and am currently pursuing a PhD in Biostatistics. I have over 8 years of tutoring experience helping students succeed in statistics courses from introductory through graduate level. I can support you with topics such as probability, regression, hypothesis testing, experimental design, and applied data analysis. My teaching style is clear, patient, and adaptable, ensuring you not only solve problems but also understand the reasoning behind them.
Biology
General Computer

Examples of Expertise

Apostolos has provided examples of their subject expertise by answering 2 questions submitted by students on Wyzant’s Ask an Expert.

See all of Apostolos ’s answers ›
Apostolos S.'s Photo

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Response time: 4 hours

Ratings and Reviews

Rating

4.6 (13 ratings)
5 star
(11)
4 star
(1)
3 star
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2 star
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1 star
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Reviews

Open-minded and patient tutor

Apostolos taught me about RStudio and R programming. He is patient with beginners and is willing to go the extra mile to make sure students can grasp the material well with confidence.

Belal, 9 lessons with Apostolos

Great tutor - AP Stats

Great attitude, able to meet my daughter where she is and noted some of the places where she needs work. Made AP stats something joyful to get into Highly recommend

Happy, 1 lesson with Apostolos

Very knowledgeable, efficient, and patient

We worked through some basic econometric problems and understanding more about R. It was first tutoring session for us but hope to continue and strengthen my understanding of multi-linear regression both in R and conceptually.

Jaeden, 2 lessons with Apostolos

would recommend

A very understanding and kind tutor!! he helped me through many issues I was having. I am taking an Econ class using STATA and he was very helpful in helping me understand how he program works. I definitely would recommend and use again!!

Rosalyn, 2 lessons with Apostolos

Knowledgeable

Apostolos provides a connection to the content I am learning, in order to me it relevant and helps my understanding. Very knowledgeable and uses clear visuals that contribute to understanding.

Karen, 4 lessons with Apostolos

Good Tutor

This tutor was able to help me understand and review some statistics terms and items I had not been familiar with in a while. He was patient and kind also ensured that I understood what we were discussing throughout the session! I felt more confident following the session.

Cassandra, 1 lesson with Apostolos

Smart and Adaptive

Quick to pick up on learning styles and knows how to pace material and building core concepts. Nice to find someone who can build up topics and ideas and break them down as easily as such to explain connections and meanings. Changed how I viewed set theory for life

Stefan, 1 lesson with Apostolos
Hourly Rate: $40
Response time: 4 hours
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