Question: In Example 10.8 (p. 385), the information given was that 3% of a nationwide randomly selected sample of n 5 883 suffered from severe allergies.

In Example 10.8 (p. 385), the information given was that 3% of a nationwide randomly selected sample of n 5 883 suffered from severe allergies.

a. Determine the standard error of the sample proportion in this problem.

b. Verify that the margin of error is about 1.1% for a 95%

confidence interval for the percentage that suffers from severe allergies in the population represented by this sample.

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