Random Variables (HSC SSCE Mathematics Advanced): Flashcards

Variable linking random process outcomes to numerical values

Capitals ($X$, $Y$) for variables; lowercase ($x=3$) for values

Set of all possible outcomes of an experiment

Variable with countable, specific values that can be listed

Variable taking any value within an interval or range

Discrete: countable values; Continuous: any value in interval

Things you can count (e.g., students, goals)

Measurements (e.g., height, time, temperature)

Number of heads flipping coins: $X = 0, 1, 2$

Time to complete task (any positive real number)