Week 2 · Effective Visual & Reporting

Effective Visual & Reporting

You found the gem in Week 1. This week is about showing it well — choosing between a table, a figure or plain text, and designing each so the message is instant.

By the end of this week you can…

Decide when to use a table, a figure, or plain text.
Apply the rules of effective reporting — complementary, referenced, explained.
Design clean tables (combine, divide, declutter) and clear figures (labels, legends, units).
Use a heatmap to reveal patterns hiding inside a table.

2.1 A good analysis, badly reported, persuades no one

By now you can dig through data and find something worth saying. But the audience never sees your effort — they only see the final table or chart. Effective reporting is the craft of making that final piece do the talking, quickly and honestly.

● Key idea

Three ways to present data — text, tables, figures — each has a job. Choosing the wrong one buries your message even when the numbers are correct.

2.2 Text, table, or figure — how to choose

Use…	When you have…	Because…
Plain text	Only one or two numbers	A sentence is faster than a whole chart.
A table	Exact values, several variables or units	Readers can look up precise figures.
A figure	A trend, comparison or pattern	Shape is read instantly; numbers are not.

● Example · One report, three choices

A university open-day report on the Diploma in Statistics:

Text: “Intake grew from 120 students in 2024 to 168 in 2026.” (two numbers — no chart needed)
Table: intake by programme and year with exact counts — readers want the precise figures.
Figure: a line chart of total intake 2018–2026 — the upward trend is the story.

The same data, three ways — Diploma intake

As text

“In 2026, intake reached 168 students — up from 120 in 2022, a 40% rise.”

Best when it's just one or two numbers.

As a table

Year	Students
2022	120
2023	138
2024	145
2025	156
2026	168

Best for exact values.

As a figure

Best for showing the trend.

Identical numbers. Text answers "how much?", the table gives every value, and the figure shows the trend at a glance — choose the form that fits your message.

2.3 Four rules of effective reporting

Complementary, not repetitive. A table and a chart should add to each other, never show the same numbers twice.

Every table and figure is referenced in the text. If you never mention it, delete it.

Summarise in words, illustrate with the visual. Tell the reader what to notice.

Explain the unexpected. A surprising dip or spike needs a sentence of “why”.

● Referencing phrases you can reuse

“Table 1 shows…”, “As illustrated in Figure 2…”, “From Table 3, we see that…”, “Figure 4 compares…”. Every visual earns its place by being pointed to.

● Watch out

The most common student error is a table and a chart of the identical numbers, back to back. That's repetition, not reporting — pick the one that carries the message, or make them complementary (table for exact values, chart for the trend).

● Try it · Text, table or figure?

For each, decide the best format: (a) the single fact that 92% of graduates found jobs; (b) monthly e-wallet transactions over three years; (c) exact fees for six different diploma programmes. Justify each choice in one line.

● Session 1 recap

Match the format to the message: text for one or two numbers, a table for exact values, a figure for a trend or comparison. Then follow the four rules — complementary (not repetitive), referenced in the text, summarised in words, and explained where surprising.

2.4 Designing tables that get read

A table works when the data stands out and the decoration disappears. Four habits do most of the work:

Combine repetitive tables into one so readers can compare at a glance.
Divide large data into clearly, accurately titled columns.
Declutter — light borders or white space, never heavy gridlines competing with the numbers.
Move bulky data to an appendix if a full table would overwhelm the page.

● Key idea

Borders should help reading, not shout. Let the data sit in the foreground; the table itself should almost vanish.

Same table — cluttered vs decluttered

✗ Cluttered

BRANCH	SALES (RM)
Ampang	12,400
Bangi	9,800
Cheras	15,100

✓ Decluttered

Branch	Sales (RM)
Ampang	12,400
Bangi	9,800
Cheras	15,100

Same numbers. Heavy borders, shading and bold everywhere fight the data; light borders and white space let the numbers lead.

2.5 The heatmap — a table you can see

A heatmap (highlight table) keeps the exact numbers but adds colour: darker means higher. Your eye finds the highs and lows before you read a single value.

🔎 See it for yourself

Which state had the highest SPM Add-Maths pass rate? Scan the plain table first…

State	2024	2025	2026
Selangor	72	75	78
Pahang	61	64	69
Johor	68	66	71
Kelantan	55	58	63

Now colour the same numbers — the pattern (and Selangor’s lead) jumps out.

2.6 Designing figures that are clear

Make the image clear — legible fonts, sharp lines, readable against the background.
Use a legend to carry the key message and explain any symbols.
Label everything that matters — both axes, each series, the important points.
Specify details — units on every quantity, scale bars on maps.

● Example · A figure that fixed itself

A Ramadan-bazaar sales chart labelled only “Amount” confused every reader. Adding the unit (RM), a title (“Daily stall sales, week 1”), and a one-line legend turned it from decoration into evidence — nothing about the data changed, only the labelling.

Same chart — unlabelled vs labelled

✗ No labels

Amount of what? Which days? What units?

✓ Fully labelled

Title, axis, units and day labels — now it's evidence.

Identical bars. Labels (title, axes, units, categories) are what turn a shape into a message a reader can trust.

● Common mistakes

Chartjunk (heavy borders, background shading, 3D), figures with no units, and unreferenced visuals. Each adds effort for the reader and subtracts trust.

● Session 2 recap

Design tables so the data leads — combine, divide, declutter. A heatmap turns a grid of numbers into an instant pattern. Label figures fully (axes, units, legend) and cut the chartjunk.

Key terms & definitions

Complementary presentation: A table and a figure that add to each other — never showing the same numbers twice.
Referencing: Pointing to every table/figure in the text ("Table 1 shows…"); unreferenced visuals are removed.
Declutter: Removing heavy borders, shading and gridlines so the data stands out.
Heatmap (highlight table): A table coloured by value — darker = higher — to reveal highs, lows and patterns at a glance.
Legend: The key that explains a figure's colours and symbols and carries its main message.
Chartjunk: Decorative clutter (3D, shadows, rainbow palettes) that adds effort but no meaning.

✅ Quick self-check

1. You need to report six programmes’ exact fees. Best format?

2. A figure appears in your report but is never mentioned in the text. You should…

3. What does a heatmap add to an ordinary table?