Module 04 Activity

Scenario

The comparison is decided. Now choose the chart that makes it easiest to read.

What you build

A comparison chart set: correctly sorted, correctly baselined, with the change drawn rather than computed by the reader.

Steps

1. Sort every categorical chart by the value the question asks about. Note any where a natural order should be preserved instead.
2. Check every bar chart's baseline and fix any that are truncated.
3. Find one before-and-after comparison in your set and rebuild it as a slope chart. Compare how quickly the change is visible.
4. Find any chart with more than ten categories and rebuild it as a dot plot. Report the difference in ink.
5. Find any ranked list and add the underlying values. Report the largest and smallest gaps between adjacent ranks.
6. Say which ranks in that list are separated by rounding error.

Evidence to hand in

• The sort decisions, including any natural orders preserved.
• The baseline audit.
• The slope chart alongside the original.
• The dot plot alongside the original.
• The ranked list with values and adjacent gaps.
• Which ranks are not meaningfully different.

Review checklist

• Every categorical chart is sorted by the value the question asks about.
• No bar chart has a truncated baseline.
• The slope chart makes the change visible faster than the original.
• Charts with many categories use dots rather than bars.
• Every ranked list shows the values, and rounding-error gaps are named.

Mark complete