Family practice
Bar height is frequency.
Optional until a teacher marks it
30–4
55–9
310–14
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 8. What we learned, an example, a few together, then independent practice.
30–4
55–9
310–14