Mean practice

Practice session

What you practise

Most questions ask for the mean. Once you get the mean right consistently, median questions are mixed in, so you learn to tell the two apart. The feedback flags dividing by the wrong count and giving the median instead of the mean.

Example

Calculate the mean of 2, 5, 5, 8, 11.

1. Sum = 31
2. Count = 5
3. 31 ÷ 5 = 6,2

Answer: 6,2 (Dutch notation uses a decimal comma; 6.2 is accepted too).

What you need to know

The mean in the 2027 syllabus, for the level we have a source for. Not a complete exam list.

vwo · wiskunde A · domain E

Statistiek en kansrekening (statistics and probability) · source syllabus wiskunde A vwo 2027 (Examenblad)

Note: this domain belongs to the school exam (SE), not the central exam.

• Mean: sum ÷ count
• Not mixing up the mean with the median or the mode
• Using the right n (number of values)

We have not checked the vmbo and havo syllabi for the mean yet; practice works at every level.

Formula sheet

Print-friendly: use Print in your browser.

• Mean $$\overline{x}=\frac{\mathrm{sum}}{\mathrm{count}}$$
• Example 2, 5, 5, 8, 11 → 6,2 $$\frac{31}{5}=\mathrm{6,2}$$

Median (mediaan)

The middle value after sorting; with an even count, the mean of the two middle values.

Mode (modus)

The value that occurs most often.

Practice with real exam questions on Examenblad.nl (in Dutch). We do not host past exams.

Frequently asked questions

How is the median different?

The median is the middle number after sorting. The mean is the sum divided by the count.

Which calculator goes with this?

The mean calculator also shows the median and the mode.