Probability 0.0 / 5 ? MathematicsProbabilityGCSENone Created by: Emily.JCreated on: 05-11-17 12:08 What is probability? Probability describes how likely a future event is. 1 of 19 Impossible- Definately cannot happen. 2 of 19 Unlikely- Low chance. 3 of 19 Evens- Equal chance. 4 of 19 Likely- High chance. 5 of 19 Certain- Definately will happen- 6 of 19 What probabilities must add up to- 1. 7 of 19 Trial- One performance of a probability experiment (do something once). 8 of 19 Outcome- A possible result from a trial (something that could happen). 9 of 19 Event- A set of outcomes meeting some criteria. 10 of 19 Equally likely outcomes- every outcome has the same chance of occuring. 11 of 19 Probability of an event= Number of equally likely outcomes that belong to an event/ Total no. outcomes. 12 of 19 Expected value= Reward x Probability. 13 of 19 Mutually exclusive events- When we have considered all the different possibilities and they don't overlap, we know the probabilities add up to 1 ( mutually exclusive event). 14 of 19 What does P (A) = 1- P (A') mean? Probability of A happening = 1- Probability of a not happening. 15 of 19 What is experimental probability used for? We can use experimental probability to find the probability of outcomes for more complex events. 16 of 19 What should happen as more trials are done? The experimental probability should get closer to the theroretical probability. 17 of 19 Relative frequency= The number of times an event occured out of the total number of trials OR times event happened/ total trials. 18 of 19 Expected probability= Probability (of event occuring) x number of (future) trials. 19 of 19
Comments
No comments have yet been made