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7.5

Probablity Review

TermDefinition
population inference to make a population inference (based on sample information given), write and solve a proportion
To find percent using a proportion Write and solve a proportion part/whole = %/100
what is the probability of a certain event 1
Probability likelihood that a particular event will occur, must be between 0 and 1
What is the probablity of an impossible event 0
How do you find the probability of an event numerator= number of ways it can happen denominator= total number of outcomes Probability of a 6 = 1/8 (there is 1 six and 8 total outcomes)
Independent Probability Principle that probability of one event occurring has no effect on the probability of the other.
Dependent Probability Two events are dependent if the outcome or occurrence of the first affects the outcome or occurrence of the second so that the probability is changed.
calculate multiple events probablity multiply the probalities together- if dependent, subtract out what you have already selected from the second probablity
counting principle uses multiplication to find the number of possible ways two or more events can occur multiply the number of choices together
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