Posted: April 5th, 2021
An environmental agency worries that many cars may be violating
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)
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