Aims and objectives
Aim
To introduce the basic demographic measurement tools, and to be able to calculate examples of each.
Objectives
By the end of this session you will be able to:
- explain the difference between rates, ratios, and proportions.
- calculate rates, ratios and proportions.
- calculate and describe sex ratios, and why they are important.
- discuss the different denominators which may be used for calculating rates, and explain why demographers usually use the mid-year population.
- describe the difference between prevalence and incidence.
- explain what is meant by ‘period’ and ‘cohort’ data.
- describe the difference between a ‘real’ and a ‘synthetic’ cohort.
- draw and explain Lexis diagrams.