Stem-and-leaf diagrams

Splitting each value into stem and leaf under a key, with the leaves ordered.

Back-to-back stem-and-leaf diagrams

Two data sets sharing one set of stems, with left-hand leaves read outwards.

Frequency polygons

Plotting each class frequency at its midpoint, not at the class boundaries.

Histograms with equal class widths

Frequency diagrams for continuous data, where the bars touch with no gaps.

Practice

Stem-and-leaf diagrams

Splitting each value into stem and leaf under a key, with the leaves ordered.

Practice

Back-to-back stem-and-leaf diagrams

Two data sets sharing one set of stems, with left-hand leaves read outwards.

Practice

Frequency polygons

Plotting each class frequency at its midpoint, not at the class boundaries.

Practice

Grouped data diagrams review

Stem-and-leaf, frequency polygons and equal-width histograms.

Mixed review