# ferdo R Lab — Lesson 5, student kit v1.0

Independent tutoring content, NOT official UCL course material.
Student's actual module is unconfirmed. Every record is synthetic.
Base R only; no install.packages needed.

## Open
1. Unzip into a new folder. Keep data/ and scripts/ paths.
2. In RStudio set the working directory to the extracted root folder.
3. Check: file.exists("data/class_synthetic.csv") -> TRUE.
4. Run: source("scripts/check_setup.R")
5. Run: source("scripts/lesson05_demo.R")
6. Complete scripts/lesson05_practice.R independently.
7. Full check: source("scripts/acceptance_test.R")

The demo shows TWO graphics in sequence, not a 2x2 panel, to
avoid overfilling the RStudio Plots pane. Use its plot-history arrows.
If 'figure margins too large' appears, enlarge the Plots pane;
on Windows you can open windows(width=12, height=8) before source().

Expected success messages only upon real RStudio execution:
R LAB LESSON 5 SETUP CHECK PASS
R LAB LESSON 5 ACCEPTANCE TEST PASS

Files: index.html, workbook.html, cards.html, worksheet.md, cards.md,
README.md, data/class_synthetic.csv and scripts/lesson05_demo.R,
scripts/lesson05_practice.R, scripts/check_setup.R,
scripts/acceptance_test.R.

Instructor solutions remain only in private Divan pages.
Linear association in these fake observations is NOT causal evidence.
P-values, formal hypothesis tests and confidence intervals require
a separate syllabus-confirmed module, not included here.