20 Confidence intervals for one proportion

So far, you have learnt to ask a RQ, identify different ways of obtaining data, design the study, collect the data describe the data, summarise data graphically and numerically, and understand the tools of inference.

In this chapter, you will learn about confidence intervals for one proportion. You will learn to:

• identify situations where the analysis of one sample proportion is appropriate.
• form confidence intervals for single proportions.
• estimate the sample size needed to estimate a proportion within given constraints.