Primary data is collected first-hand by the business for its own present question. Secondary data already exists, because someone gathered it earlier for a different purpose. IGCSE Business often asks you to classify sources, then say which kind suits a business in a given case, and why.
This lesson follows framing a research question, because the question decides which kind of data is worth the effort. It sits within the market research module.
How do the two kinds of data compare?
| Point | Primary data | Secondary data |
|---|---|---|
| Who collects it | The business, for this question | Someone else, earlier |
| Fit to the question | Usually close, because you design it | May be only partly relevant |
| Cost and time | Higher: planning, collecting, analysing | Lower: often free or quick to buy |
| Up to date | Fresh | May be old |
| Control | The business decides the sample and wording | The business cannot change how it was gathered |
Neither kind is always better. A business often uses secondary data first to learn the background cheaply, then primary data to answer what is still unknown.
How to classify and choose, step by step
- Ask who collected it, and for what purpose. If your business collected it for this question, it is primary. If it existed before, it is secondary.
- Ignore the format. Online, on paper, in a table or in a speech does not change the type.
- Judge fit. Does it cover the right people, place and time?
- Judge cost and speed against the size of the decision.
- State a conclusion that names a source and gives a reason.
Worked example
FitZone plans to open a gym in Kuching. The owner lists five pieces of information:
- A: a table of the age groups in the city, from a council report published two years ago
- B: an online survey the owner designs and sends to 80 local people
- C: the price lists on the websites of three competing gyms
- D: the owner standing outside a rival gym for a week and counting visitors by hour
- E: the owner’s own membership figures from a smaller gym she ran last year
Step 1, who collected it and why:
- A was gathered by the council for planning, so it is secondary.
- B was designed by the owner for this question, so it is primary.
- C was published by competitors for their customers, so it is secondary.
- D is first-hand observation for this question, so it is primary.
- E was recorded for running the earlier gym, so it is usually treated as secondary. Check whether your course also calls this “internal” data.
Step 2, cost. The survey costs RM3 per response for incentives and printing. For 80 people, 80 × RM3 = RM240. The council report is free to read.
Step 3, a reasoned choice. The owner should start with A and C, which are free and show the city’s age profile and the going price. They do not show whether local people would join, or at what price. That gap is why she spends the RM240 on B.
The mistake to watch for
A common slip is to label data by how it was obtained rather than who collected it.
Mistaken answer: “The trade report is primary data because the owner paid RM150 for it.”
Paying for data does not make it primary. The report was written for a general audience, not for this owner’s question.
The correction is to ask “did this business collect it for this question?” A purchased report, however useful, is secondary. A free sketch of footfall counted by the owner herself is primary.
Check yourself
Try these, then open each answer.
1. Classify as primary or secondary: (a) interviews a café owner conducts with five regular customers; (b) a newspaper article about coffee prices.
Show answer
(a) Primary: collected first-hand for the owner’s question. (b) Secondary: written earlier for other readers.
2. Give one advantage of secondary data and one limitation.
Show answer
Advantage: it is usually quicker and cheaper to obtain. Limitation: it may be out of date or may not match the exact question, and the business cannot control how it was collected.
3. A survey of 80 people costs RM3 per response. A report that covers the same topic costs RM150. Which costs more, and by how much? Give one reason the dearer option might still be chosen.
Show answer
Survey: 80 × RM3 = RM240. The survey costs RM240 − RM150 = RM90 more. It might still be chosen because it asks the exact question about the owner’s own customers, which the report cannot do.
Where this leads next
Collecting your own data brings a new risk, which is asking questions badly. Move on to spotting a biased survey item, then try the practice set.
If you tend to give definitions without choosing a source for the case, our teachers can help you practise the reasoning in online one-to-one Business tuition.