3. An important 1977 U.S. Supreme Court case, Castaneda v. Partida, was explicitly decided on statistical evidence. A grand jury decides whether a person will have to stand trial. Of the 870 people who were summoned to serve as grand jurors by the largely Hispanic county officials in Hidalgo County, Texas over an 11-year period, 339, or 39%, were Spanish surnamed. Census figures showed that 79% of the county's population had Spanish surnames. Castaneda was convicted of a crime and appealed. While grand jurors were not selected by chance in those days (as they typically are now), comparing the actual jurors to what might happen if jurors were selected randomly can help us decide whether there is any evidence of possible unfairness in the selection process. caselaw.Ip.findlaw.com/scripts/getcase.pl?court=US&vol=430&invol=482 a. Fill in the correct numbers. n: p: number of successes: Po: b. Compute and interpret the test statistic for this situation: z= P- Po where SE = Po (1 - Po) n SE c. Does it seem plausible to you that the grand jury was selected without regard to last Explain. name