probability distribution function
nounUK /ˌprɒbəˈbɪləti ˌdɪstrɪˈbjuːʃən ˈfʌŋkʃən/
US /ˌprɑːbəˈbɪləti ˌdɪstrɪˈbjuːʃən ˈfʌŋkʃən/
A math rule that tells you how likely each possible result is.
The teacher used a probability distribution function to show how often each number comes up when rolling a die.
OTHER MEANINGS
2. A function that gives the probability that a random variable is less than or equal to a given value.
The cumulative probability distribution function rises from zero to one.
3. A mathematical description of how probabilities are spread across the values of a random variable.
The normal probability distribution function forms a bell-shaped curve.
4. A rule assigning probabilities to each outcome in a sample space.
For a fair coin, the probability distribution function gives 0.5 to heads and 0.5 to tails.