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 of 6% and 95% confidence.To gauge the size of the problem, the agency first picks 40 cars and finds 6 with faulty emissions systems. How many should be sampled for a full investigation?
The environmental agency should sample at least ____vehicles? (round to the nearest whole number)
This question was answered on: Sep 21, 2023
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