Select your strongest evidence
Begin by selecting your strongest evidence.
Review the artifacts you created across Modules 1–14. Which evidence items best answer a coherent statistical question? Select at least five and explain why each one belongs in your final narrative.
Check each claim before it enters the portfolio. When the groups chose their own treatment, such as which study method to use, the comparison shows an association, not a cause: the students who chose each method may have differed from the start. A chart making a causal claim from self-selected groups must be repaired, by rewording the claim as an association, before it can serve as evidence. Evidence is defensible as stated when another analyst could check it (the data snapshot and runnable code are included) and its caption states what the sample can and cannot support.
Evidence selection checklist
For each artifact, ask: What does this evidence show? What question does it answer? Why is it stronger than the alternatives?
- DV01–DV02: Statistical questions and data cleaning evidence
- DV03–DV04: Descriptive statistics and visual encoding
- DV05–DV06: Distributions and group comparisons
- DV07–DV08: Association, regression, and causal boundaries
- DV09–DV10: Uncertainty and simulation
- DV11–DV12: Multivariate and time-series visualization
- DV13–DV14: Dashboards and ethics
- DV15–DV16: Reproducibility and AI audit
- DV17–DV18: Bayesian criticism and PCA
- DV19–DV20: Time-series and Shiny dashboards
- DV21–DV22: Ethics, privacy, and reproducibility audit