Practice Questions

1.State what a risk factor is

A risk factor will increase the chance that a person will suffer from a particular disease. 

2. When sampling, what factors should we consider?

Random sampling: Every individual has an equal chance of being chosen → reduces bias

Sample size: Larger samples usually give more reliable results

Representative sample: The sample should reflect the population (age, gender, lifestyle)

3. Explain what is meant by a positive correlation

As one variable increases, so does another variable.