The big idea
🏷️
The type decides the summary
Half of all statistical nonsense is the right formula applied to the wrong sort of data.
Statistics for Everyday Life · Lesson 2
Types of Data
beginner⏱ 16 min · 7 cards
Try it
Name the Type
“Blood type (A, B, AB, O)”
What kind of data is this, and therefore which summaries are honest?
Classify measurements and decide which summaries are legitimate.
Three kinds
What you can do with each
Tap each.
Key term
The disguise
When is a number not a quantity?
tap to reveal ↻
Numbers as labels
Postcodes, squad numbers, survey codes. The test: does arithmetic on it produce something that means anything? The average of two postcodes is not a place.
Nuance
Same 4.0 stars
Maester Note
A product rated consistently 4s and 5s, and one split between 5s and 1s, share an average and describe entirely different purchases.
Quick check
What makes statistics necessary?
You did it
Nice work
Mark this lesson complete to track your progress.