xlsx, 19.52 KB
xlsx, 19.52 KB

If you survey or measure anything in your school where you are unable to get 100% response rate, (e.g. parental feedback) there is an error margin on each result. This document calculates the size of the confidence interval based on the size of the population (e.g. number of parents or pupils being surveyed) and the number of people that responded to the survey.

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