# More than a decade ago, high levels of lead in the blood put 88% of children at risk. A concerted

## Question:

(a) In a random sample of 200 children taken more than a decade ago, what is the probability that 50 or more had high blood lead levels?

(b) In a random sample of 200 children taken now, what is the probability that 50 or more have high blood lead levels?

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**Related Book For**

## Understanding Basic Statistics

**ISBN:** 9781111827021

6th Edition

**Authors:** Charles Henry Brase, Corrinne Pellillo Brase

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