How to Conduct Research: 8 Essential Steps & Best Practices
Learn how to conduct research properly with 8 essential steps. Complete guide covering research process from problem identification to sharing findings.
By Dr. Leonard Cucos
en
Master Statistics, Data Science & AI
Free tutorials, guides, and resources to help you excel in statistical analysis, data science, and artificial intelligence. Available in English, Romanian, and Thai.
Featured Posts
How to Take a Simple Random Sample: 4 Steps & Examples
Learn how to take a simple random sample in 4 steps. Includes definition, examples, Excel/SPSS/R methods, and when to use simple random sampling.
By Dr. Leonard Cucos
en
Null Hypothesis: Definition, Symbol & When to Use It
Learn what a null hypothesis is, its symbol (H₀), and when to use it. Includes definition, examples, how to write it, and when to reject or accept.
By Dr. Leonard Cucos
en
Latest Tutorials
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What is Research: Definition & 8 Key Characteristics
Learn what research is with clear definition and 8 key characteristics. Includes examples, types, and the difference between good and poor research.
By Dr. Leonard Cucos
en
Research Methods
Quantitative Research Ideas & Topics for Students: 5 Complete Examples
Explore 5 complete quantitative research ideas with research questions, hypotheses, variables, methodology, and data analysis. From simple correlation to mediation and moderation.
By Leonard Cucos
en
![What is T-Test? Definition, All 3 Types, and How to Read T-Test Values [Complete Guide]](/images/blog/en/featured/what-is-t-test.png)
Statistical TestsResearch Methods
What is T-Test? Definition, All 3 Types, and How to Read T-Test Values [Complete Guide]
T-test is a statistical test used to compare means of groups. Learn the definition, all 3 types (One-Sample, Paired, Independent), formulas, and how to read p-values in this complete guide.
By Leonard Cucos
en
![How to Do T-Test in Excel: Complete Guide for All 3 Types [One-Sample, Independent, Paired]](/images/blog/en/featured/t-test-in-excel-complete-guide.png)
Statistical TestsExcel
How to Do T-Test in Excel: Complete Guide for All 3 Types [One-Sample, Independent, Paired]
Learn how to perform t-test in Excel with step-by-step formulas for all 3 types: One-Sample, Independent Samples, and Paired t-tests. Includes downloadable Excel template and complete interpretation guide.
By Leonard Cucos
en
SPSS TutorialsAdvanced Analysis
How To Run Multiple Moderation Analysis in R Like A Pro
In this lesson, we will learn how to run multiple moderation analysis in R. By exploring the impact of multiple moderators, we can deepen our understanding of the dynamics between our variables of interest and shed light on potential interactions. Statistical analyses often reveal intriguing relationships between variables. However, relationships among variables are usually more [...]
By Leonard Cucos
en
R ProgrammingData Analysis
How to Import a CSV File in R: 6 Easy Steps
Learn how to import CSV files into R and RStudio in 6 easy steps. Master both GUI and code methods using read.csv() function. Includes step-by-step guide with screenshots, FAQ, and best practices for loading CSV data in R.
By Leonard Cucos
en
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