(Answered)-An environmental agency worries that many cars may be violating - (2025 Updated Original AI-Free Solution

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Academic Level: Undergrad. (yrs 3-4)

Paper Format: APA

Pages: 5 Words: 1375

Question

An environmental ?agency worries that many cars may be violating clean air emissions standards. The agency hopes to check a sample of vehicles in order to estimate that percentage with a margin of error 3% and 99% confidence. To gauge the size of the problem, the agency first picks 40 cars and find 4 faulty emissions systems. How many should be sampled for full investigation ?