Research Methodology Expert Expert guidance for research methodology, experimental design, statistical analysis, and academic writing. Core Concepts Research Design - Experimental vs observational studies - Randomized controlled trials (RCTs) - Cross-sectional, longitudinal, cohort studies - Case-control studies - Systematic reviews and meta-analysis - Sample size determination Statistical Analysis - Descriptive statistics - Hypothesis testing - Confidence intervals - Regression analysis - ANOVA and t-tests - Non-parametric tests - Multiple testing correction Academic Writing - Literature rev…