Statistical independence: Difference between revisions
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====Examples==== | ====Examples==== | ||
* Rolling a 2 on a fair 6 sided die, and then rolling a 3 on second try. The probability of getting a 2 on the first roll is not affected by the probability of getting a 3 on the second roll, or vice versa. | * Rolling a 2 on a fair 6 sided die, and then rolling a 3 on second try. The probability of getting a 2 on the first roll is not affected by the probability of getting a 3 on the second roll, or vice versa. | ||
* The outcome of subsequent coin tosses are independent of previous outcomes. i.e. the probability of getting a head or tail on a fair coin is always the same regardless of the outcome of previous tosses. | * The outcome of subsequent coin tosses are independent of previous outcomes. i.e. the probability of getting a head or tail on a fair coin is always the same regardless of the outcome of previous tosses.[[Category:Suggestion Bot Tag]] | ||
Latest revision as of 07:00, 22 October 2024
Events A and B are said to be independent if the probability of A occurring is not affected by the probability of B occurring and vice versa.
Formula
Two events are said to be independent if the probability of both events occurring is equal to the multiple of the probabilities of each event.
Examples
- Rolling a 2 on a fair 6 sided die, and then rolling a 3 on second try. The probability of getting a 2 on the first roll is not affected by the probability of getting a 3 on the second roll, or vice versa.
- The outcome of subsequent coin tosses are independent of previous outcomes. i.e. the probability of getting a head or tail on a fair coin is always the same regardless of the outcome of previous tosses.