Statistics & Probability

If you are making a decision based on the odds of something happening, you are using

sample that is not biased; a good way of getting a sample that is representive of the population

using anyone who happens to be available as the sample

selected to include members of all of the different groups in the population

choose every "nth" (e.g. 10th or 15th) person in the population

selected so that everyone in the target population has an equal chance of being picked

first participant is chosen, then that person finds others to take part

making a decision based upon what has happened in the past

group of people you are trying to get information about