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In the case of Castaneda v. Partida, it was found that in a period of 11...

In the case of Castaneda v. Partida, it was found that in a period of 11 years in Hidalgo County, Texas, 870 people were selected for grand jury duty and 339 of them were Americans of Mexican ancestry. Among the people eligible for grand jury duty, 79.1% were Americans of Mexicans ancestry. Use a 0.01 level of significance to test the claim that the selection process was biased against Americans of Mexican ancestry. (In other words, that the proportion of Americans of Mexican ancestry that were selected was less than 79.1%) What is the parameter that is being studied in this test ?

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Answer #1

Here the population proportion is parameter of interest

That is the proportion of Americans of Mexican ancestry eligible for grand jury duty p = 0.791

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