Data Analysis: CAS Skills & Exam Technique

What this note covers

1. One-variable statistics on CAS: the core workflow
2. Decoding the output screen: every symbol, and the sx versus σx trap
3. Boxplots and the outlier test the examiner will accept
4. Least squares regression on CAS, without the slope–intercept mix-up
5. Residual plots: build them, read them, write about them
6. Rounding rules that protect your marks
7. How Exam 2 awards data-analysis marks: the wording assessors expect

7 sections · 14 key terms & formulas · 6 common mistakes