870 people were selected for grand jury duty and 39 if them, Ask an Expert

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870 people were selected for grand jury duty, and 39% if them were Americans of Mexican ancestry. Among the people eligible for grand jury, 79,1% were Americans of Mexican ancestry. Use a 0.01 significance level to test the claim that the selection process is biased against Americans of Mexican ancestry. Does the jury selection system appear to be fair?

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