A random sample is one

a) that is unplanned.

b) that is haphazard.

c) in which every sample of a particular size has an equal probability of being selected.

d) that ensures that there will be no uncertainty in the conclusions.

Which of the following is a random sample of a college student body?

a) Every 20th person in the student directory.

b) Lisa Meyer, Todd Jones, and Maria Rivera, whose ID numbers were picked from a table of random numbers.

c) Every fifth person coming out of the Campus Center between 8:30am and 10:00am.

d) All are examples of random samples.