We need to be able to distinguish between **qualitative** and **quantitative** data (the latter one is generally more interesting to us as mathematicians.

We also need to be able to distinguish between quantitative data which is **discrete** and **quantitative** data which is continuous.

Let’s try some examples with the teacher and then complete the exercise below

**Exercise**

Let’s complete exercise 6A from page 82 of the textbook:

The answers are below:

**Collecting data**

- Let’s have a class discussion about what methods you would use to collect different types of date, e.g.:
- The world’s highest mountain;
- The most popular TV show among students in the school;
- The boiling point of an unknown liquid that you have discovered.

Some things we should also think about when collecting data are **sample size** and **degree of accuracy of measurement** (for instance with age of person).