ESS210B
Prof. Jin-Yi Yu
Example
q If you throw a die, there are six possible outcomes: the numbers 1, 2, 3, 4, 5 or 6. This is
an example of a random variable (the dice value), a variable whose possible values occur at random.
q When the random variable actually attains a value (such as when the dice is actually
thrown) that value is called an observation.
q If you throw the die 10 times, then you have a random sample which consists of 10
observations.