During a period of 11 years 2058 of the people selected for

During a period of 11 years 2058 of the people selected for grand jury duty were sampled, and 26 % of them were immigrants. Use the sample data to construct a 99% confidence interval estimate of the proportion of grand jury members who were immigrants. Given that among the people eligible for jury duty, 30.2 % of them were immigrants, does it appear that the jury selection process was somehow biased against immigrants?

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