Standard practice
Bar height is frequency.
30–4
55–9
210–14
A histogram’s bar height tells how many data values fall in that interval.
In a histogram, frequency is encoded by height. Counting bars answers how the axis was chopped up, not how many observations were collected.
Problem 1 of 9. Activate, study a model, try guided items, work independently, apply, and reflect.
30–4
55–9
210–14