Building number confidence: Graphical data

3. Tables

Tables summarise and display precise information, such as numerical values, in rows and columns with appropriate headings. The structured format makes it easy to look up and compare information.

Let's look at some examples.


Class timetable

Let’s imagine you work as a learner support assistant and are expected to accompany a student to all their lessons. In the class timetable below, the column headings contain the days of the week (Mon to Fri), and the row headings show daily class times.

To check what class you should attend on a given day and time: locate the class time in the first column and then look along this row until you find the subject listed under the day (e.g. ‘Thu’) column heading.


  Mon Tue Wed Thu Fri
09:00 - 10:30 Maths English Art Geography Languages
10:40 - 12:10 Physics Geography Maths Languages English
12:10 - 13:00 Lunch break
13:00 - 14:30 Biology Maths English History Music
14:40 - 16:00 Languages Art History English Maths
 Data check

What time is the Music class on Friday?

The Music class runs from 13:00 to 14:30. You can find this by locating 'Music' in the column with the 'Fri' heading, and then looking along this row to find the row's heading (time slot) in the first column.


Daily sales report

In the daily sales report below, the number of teas and coffees sold in a cafe during the last week are listed. The column headings contain the type of coffee, or tea, and the row headings show the days of the week.

To check the number of sales in each category on a particular day: locate the day in the first column and then read the values under each of the column headings in this row.


  Americano Latte Flat white Cappuccino Tea
Monday 76 14 20 12 35
Tuesday 60 30 14 25 17
Wednesday 57 28 30 22 25
Thursday 37 32 12 27 14
Friday 70 36 18 32 28
Saturday 72 35 27 16 32
Sunday 55 25 23 27 40
 Data check

How many lattes and flat whites were sold on Thursday?

32 lattes and 12 flat whites. Locate Thursday in column 1 and then moving along this row, note the figures in the 'Latte' and 'Flat white' columns.


The daily sales report table above gives precise information, however displaying the same data in a graph or chart could make it easier to spot trends, such as the most popular order, or the busiest day, as we'll see in the following pages.

Some tables include a total row at the bottom of one or more columns. This row adds up all the values in that column, giving you a quick overview of the total amount. Totals are useful for checking overall patterns or making comparisons.

The example below shows the number of participants from different regions signing up for activities and events at a business conference.

Region Keynote Financial
planning
workshop
AI strategy
workshop
Digital
marketing
workshop
Highland 56 11 20 22
Outer Hebrides 31 3 9 19
Orkney 15 2 4 8
TOTALS 102 16 33 49

So, if we look at the column for the AI strategy workshop, we can see that there are 20 participants from Highland + 9 from Outer Hebrides + 4 from Orkney = a total of 33 participants signed up.