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5. Suppose a large shipment of compact discs contained 12% defectives. If a sample of size...

5. Suppose a large shipment of compact discs contained 12% defectives.

If a sample of size 457 is selected, what is the probability that the sample proportion will differ from the population proportion by less than 3%? Round your answer to four decimal places.

11. A researcher believes that 8% of pet dogs in Europe are Labradors.

If the researcher is right, what is the probability that the proportion of Labradors in a sample of 644 pet dogs would be greater than 6%? Round your answer to four decimal places.

Math   Statistics-And-Probability   
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