The Chairman of a Statistics Department in a Certain College $\pi$

Short Answer

The chairman of a statistics department in a certain college believes that 70% of the department's graduate assistantships are given to international students.A random sample of 50 graduate assistants is taken.Assume that the chairman is correct and that $\pi$
= 0.70.What is the probability that the sample proportion p will be within $\pm$ 0.05 of the population proportion $\pi$
?