The batf wants to evaluate true average lead level for, Ask an Expert

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The Bureau of Alcohol, Tobacco, and Firearms (BATF) has been worried about lead levels in California wines. Table given below reports results from pilot test which measured lead levels in random sampling of wines.

Table 1: Descriptive statistics for lead in wine study
Variable n mean Std.Dev SEmean
lead 15 120 150 38.73

The BATF wants to evaluate true average lead level for California wines to within 29 parts per billion at 95% level of confidence?

You must carry at least 5 decimal precision for any intermediate computations then round your answer as indicated in the problem.

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Category:- Statistics and Probability
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