Dot Plots, Stem and Leaf Plots

Dot plots and stem-and-leaf plots keep every value in order, so statistics can be read straight off them. This NSW Year 8 maths subtopic (NESA outcomes MA4‑DAT‑C‑01 and MA4‑DAT‑C‑02) starts with the key, because \(7 \mid 4\) might mean 74 or 7.4.

You will read split stems and back-to-back plots, find the median, mode, range and mean, and describe the shape of the data as symmetrical or skewed, with any clusters, gaps and outliers explained in context. Comparisons include two classes’ quiz marks, two brands of phone battery and the fish caught from two boats on a school camp. It is part of Year 8 Investigating Data.