Mod. 2 Ch. 5 Notes
What is the process for doing a conditional probability?
P(f|e) = p(f and e)/p(e) or n(f and e)/n(e) the n in the second part of the equation is just the part of the equation are both true so the number of both being true, divided by the number of e
Describe the difference between classical and empirical probability.
The empirical method obtains an approximate empirical probability of an event by conducting a probability experiment. The classical method of computing probabilities does not require that a probability experiment actually be performed. Rather, it relies on counting techniques, and requires equally likely outcomes.
what is a permutation?
an ordered arrangement of r objects chosen from n distinct objects without repetition. == nPr -- can be done on calculator
when structuring a permutation or combination, which numbers go before or after the P or C
before: the total number after: the portion of the total being used
what is a combination?
collection WITHOUT regard to order, no repetition like permutation, but this time order is NOT important. ABC is the same as CBA === nCr - can be done on calculator
Probabilities must be
greater or equal to 0 and less than 1
