1. SADC Course in Statistics To the Woods discussion (Sessions 10)

2. To put your footer here go to View > Header and Footer 2 Learning Objectives By the end of this session, you will be able to discuss the gains in precision with stratification compared to simple random sampling and the circumstances under which such gains can be expected have an appreciation of the correct computation of a ratio estimate recognise why estimating a ratio is different from estimating a proportion

3. To put your footer here go to View > Header and Footer 3 Session contents Discussion of results from the To the Woods exercise using a selected data set Post-stratification – can this be done if scheme A had been adopted? How? Revision of ideas of simple and stratified random sampling Discussion of how ratio estimates may be calculated and how they differ from estimating population proportions based on a fixed sample size.

4. To put your footer here go to View > Header and Footer 4 Post-stratification: exercise In small groups, there will be a discussion of ways in which results from Scheme A can be used to improve the estimation You will then attempt to produce such estimates and compare it with previous results of Scheme A. A discussion will follow.

5. To put your footer here go to View > Header and Footer 5