Data Analysis Expert

Marissa Duvall

Professional dissertation data analysis support for students and researchers who need clear methods, accurate results, and well-explained findings.

Marissa Duvall

About Marissa Duvall

Dr. Marissa Duvall holds a PhD in Statistics and specializes in quantitative data analysis for students at all academic levels. With expertise in hypothesis testing, regression analysis, and structural equation modeling (SEM) using SPSS, SPSS-AMOS, R, Python, and Stata, she has successfully guided over 400 students in analyzing and interpreting their research data.

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How to Do a Normality Test in SPSS

Before you run many statistical tests in SPSS, you may need to check whether your data are approximately normally distributed. This step…

How to Reverse Code in SPSS

Reverse coding is one of the most common data preparation steps in SPSS, especially when working with surveys, questionnaires, and Likert-scale items.…

 
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