In Hidalgo County, Texas, 80% of those eligible for jury duty were Mexican- Americans. Assuming that groups of 800 grand jurors are randomly selected, find the mean and standard deviation for the numbers of Mexican-Americans. Find the range of usual values (μ±20). Would 400 be a significantly low number of Mexican-Americans selected for grand jury duty?

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In Hidalgo County, Texas, 80% of those eligible for jury duty were Mexican-
Americans. Assuming that groups of 800 grand jurors are randomly selected,
find the mean and standard deviation for the numbers of Mexican-Americans.
Find the range of usual values (μ±20). Would 400 be a significantly low
number of Mexican-Americans selected for grand jury duty?
Transcribed Image Text:In Hidalgo County, Texas, 80% of those eligible for jury duty were Mexican- Americans. Assuming that groups of 800 grand jurors are randomly selected, find the mean and standard deviation for the numbers of Mexican-Americans. Find the range of usual values (μ±20). Would 400 be a significantly low number of Mexican-Americans selected for grand jury duty?
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