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April 24, 2014

Homework Help: fgcu

Posted by alexis on Wednesday, March 27, 2013 at 5:08pm.

More than a decade ago, high levels of lead in the blood put 88% of children at risk. A concerted effort was made to remove lead from the environment. Now, suppose only 12% of children in the United States are at risk of high blood-lead levels.

(a) In a random sample of 194 children taken more than a decade ago, what is the probability that 50 or more had high blood-lead levels? (Round your answer to three decimal places.)

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