Sampling. MICS3 Regional Workshop “Survey Design”. MICS Sample Design. MICS is a complex survey (Multi-stage stratified). MICS is a worldwide program, consistence & comparability are important issues. We will discuss only a few of the highlights including: Sample size determination
MICS3 Regional Workshop
1.Expected size estimate of indicators (next slide)
2.Expected size estimate of target population 12-23 mos [3%]
3.Average household size 6 persons
4.Relative margin of error wanted 12% of coverage rate
5.Level of confidence wanted 95 percent
6.Design effect in cluster surveys 1.5
7.Expected non-response rate 10 percent
8.Number of clusters or PSUs - minimum [300-400]
9.Cluster size [15-35]
10.Number of estimation “domains” wanted [5 or fewer]
11.Survey budget (country specific)
For items 2, 3, 6, 7 use available country data (recent survey or census); if not available, use value above.
- DPT immunization level
- Measles immunization level
- Polio immunization level
- Tuberculosis immunization level
* The Relative Margin of Error is the percentage of tolerable difference that the estimated proportion can differ from its true value with a given confidence level. It determines the relative length of the confidence interval.
You may use the table on the next page instead of formula if all conditions are satisfied for that table in your country.
n = [4 (r) (1 - r) (f) (1.1)] / [(.12r)2 (p) (nh)].
Use it if any (one or more) of the following applies in your country: