## Confidence intervals - Quiz

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1 |
A survey selected only 83 young children to measure the prevalence of acute protein-energy malnutrition. It found that the prevalence was 13% and the 95% confidence interval was 5% - 21%. A few days later, as part of a nutrition screening, every child in the same age range in the population was weighed and measured. It turned out that only 7% of all the children in the population had acute malnutrition. What might account for this difference between 13% from the survey and 7% from the universal weighing and measuring? |