It a recent study of college students indicated that 30 of all college students had at least one ...

It a recent study of college students indicated that 30 of all college students had at least one
  tattoo. A small private college decided to randomly and independently sample 15 of their
  students and ask if they have a tattoo.
 
  Use a binomial probability table to find the probability
  that exactly 5 of the students reported that they did have at least one tattoo.
  A) 0.722 B) 0.207 C) 0.515 D) 0.218

Q. 2

__________ is a method of interpreting the standard deviation of data that have
  a mound-shaped, symmetric distribution.
 
  A) The Empirical Rule B) Chebyshev's Rule
  C) both A and B D) neither A nor B

Q. 3

__________ gives us a method of interpreting the standard deviation of any
  data set, regardless of the shape of the distribution.
 
  A) Chebyshev's Rule B) The Empirical Rule
  C) both A and B D) neither A nor B

Q. 4

A recent study suggested that 70 of all eligible voters will vote in the next presidential election.
  Suppose 20 eligible voters were randomly selected from the population of all eligible voters.
 
  Use
  a binomial probability table to find the probability that more than 12 of the eligible voters
  sampled will vote in the next presidential election.
  A) 0.228 B) 0.608 C) 0.772 D) 0.392 E) 0.887

Q. 5

A recent article in the paper claims that business ethics are at an all-time low. Reporting on a
  recent sample, the paper claims that 42 of all employees believe their company president
  possesses low ethical standards.
 
  Suppose 20 of a company's employees are randomly and
  independently sampled. Assuming the paper's claim is correct, find the probability that more
  than eight but fewer than 12 of the 20 sampled believe the company's president possesses low
  ethical standards. Round to six decimal places.
  A) 0.621231 B) 0.260165 C) 0.396113 D) 0.662817