Question

In the case of Castaneda vs Partida, it was noted that although 80% of the population in a Texas county was Mexican-American, only 39% of those summoned for grand juries were Mexican-American. Assume that 12 jurors are to be summoned from a population that 80% Mexican-American. What is the probability that exactly 7 of the 12 jurors are Mexican-American? a) Carefully explain how this situation results in a binomial distribution. b) Write out the Binomial Probability Function without simplifying for this situation. c) Calculate the probability, to four decimal places, of selecting exactly 7 Mexican-Americans when 12 jurors were selected at random from a population that is 80% Mexican-American.

Please show more than one approach.

Answer 1

Wow ... 7 posts in 2 minutes! You must be taking a test or something.

No one here will do your work for you. You need to indicate exactly what you have done to solve each problem and where you're running into trouble.

Answer 2

It is hard to do so in the format provided.

Answer 3

a
b p(x)= nCx pX9i-p)n-x
d 0.5315