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In asample of 56water specimens taken from a construction site, 30contained detectablelevels of Lead. One wants to construct a 94% confidence interval for the proportion
In asample of56water specimenstaken from a construction site,30contained detectablelevels of Lead.One wants to construct a94% confidence interval for the proportionof water specimens that containeddetectable levels of Lead.
1. First findthe point estimate,(rounded to 2 decimal places.) :
2. Findthe critical value (rounded to 2 decimal places.)
3. Findthemargin of error.Round the value to 4 decimal places.
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