Chapter 5 Probability - Year 1 Flashcards
What is very important to not forget in venn diagrams?
The value on the outside
What is an experiment?
An experiment is a repeatable process that gives rise to a number of outcomes
What is an event?
An event is a set of one or more of these outcomes
What is a sample space?
A sample space is the set of all possible outcomes
What method may you be forced to use with probability when you are given a table with bounds?
You may need to use linear interpolation to find out the frequency when you only go part way inside a band
Explain this?
Explain this?
Explain this?
What does a venn diagram of a mutually exclusive event look like?
Either or
What does it mean if 2 events are mutually exclusive?
Give an example
They can’t happen at the same time
Eg rolling a dice and getting a 1 and 6
What do we know is true about mutually exclusive events (in terms of probability notation?
What does it mean id 2 events are independent
One event doesn’t effect the probability of the other event happening
What do we know is true about independent events (in terms of probability notation?
How do you prove wether two events are statistically independent?
You multiply the 2 probabilities together
And you work out the probability of event 1 and event 2. If they are equal then they are statistically independent
If you are told that A and B are mutually exclusive how do you draw the venn diagram of A,B and C
How do you use the information that 2 events are independent to solve for x when P(A and B)=x?
Since the events are independent the P(A or B) = P(A)P(B)
So you derive an equation with a quadratic which is equal to x and solve
