2. In each case say whether you will use the whole population or only a sample of the population for the investigation. a) Which flavour of ice cream is preferred by the learners in your class? b) How many fish are there in a 215 g tin of pilchards? c) What is the favourite type of music of a 16 -year-old?

**a) Which flavour of ice cream is preferred by the learners in your class?** Since the investigation concerns all the learners in your class and the class is a defined, small group, you can ask every member. Therefore, you use the whole population. --- **b) How many fish are there in a 215 g tin of pilchards?** A tin of pilchards contains a fixed, countable number of fish. By examining every fish within that single tin, you are considering the entire set of objects in the tin. Therefore, you use the whole population. --- **c) What is the favourite type of music of a 16‑year‑old?** This investigation targets the musical preference of 16‑year‑olds in general. Since there is a large number of 16‑year‑olds, it is impractical to ask every 16‑year‑old. Instead, you would select a representative group from this group. Therefore, you use only a sample of the population.