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Statistics

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This problem does not make any sense to me!!! I would greatly appreciate your assistance, thanks.

A recent survey showed 4.6 percent of the sample of 250 had suffered some kind of identity theft in the past 12 months.
a. Construct a 90 percent confidence interval for the true proportion of those suffering identity theft.
b. Can we assume the distribution of the population is normal? Explain your answer.

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