Consider the middle interval in the sampling distribution of p¯: (p¯1 = 0.83, p¯2 = 0.89), where p¯ is the proportion obtained from random samples of individuals 25 years or older in a Midwestern state who have a high school diploma. Given an error probability of 5 percent, what is the sample size in this sampling distribution?
a. 642
b. 590
c. 514
d. 485