Basic Probability Concepts: Experiment, Outcomes, and Events

Experiment

an action, gathering information

Sample space

recording the outcome of the experiment

Outcome

what happens in the experiment

Mutually exclusive

can't happen at the same time ( heads and tails, one or the other)

Event

actions in an experiment (1st flip, 2nd flip, etc.)

Tree diagram

everything that could happen

Theoretical

in theory, the possibility of what could happen

Equally Likely

get THH or HTT

Random

you don't know the answer (roll dice, spin spinner, etc.)

Complementary

take all events that make the total

Independent

can roll T even if you get T last time

Conditional

depends on something

Context

the surrounding situation

Permutations

order matters

nPr = n! / (n-r)!

Impossible

can't happen

Certain

will happen

Complement

if you roll 1, then 2,3,4,5, and 6 are the complements, making the total

Dependent

events depend on each other

Combinations

order doesn't matter

nCr = n! / r!(n-r)!

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