A random sample of 100 preschool children in Tokyo revealed that only 60 had been vaccinated. Provide a 90% confidence interval for the proportion vaccinated in the city.
Vaccination.docx Your answer is that the number vaccinated is between 52 and 68 with 90% confidence .
See attached document for details. Any questions, please ask immediately
Just one small correction: since n =100 we can use the normal approximation
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