STA001 · Probability & statistics · Classes 6–10
Data types
Data is categorical (names or labels: nominal, or ordered like grades: ordinal) or numerical (counts: discrete, or measurements: continuous).
🔤 🔢Data types
📐 Formula
categorical: nominal, ordinal; numerical: discrete, continuous
✏️ Worked example
Heights in cm are continuous numerical data, grouped into class intervals such as 150–160.
🌍 Where it is used
Choosing the right chart and average for a survey.
❓ Quick check
Number of siblings is…
🏋️ Practice
EasyBlood group is…?
Answer: Nominal (categorical)
MediumTime to run 100 m is…?
Answer: Continuous
ChallengeShirt size S, M, L is…?
Answer: Ordinal