Biology 2244A/B Chapter Notes - Chapter 10: Conditional Probability
25 Dec 2016
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Disjoint: event a and b cannot occur at the same time. Nondisjoint: events a and b can occur at the same time. A = first baby is a girl, b = second baby is a girl. Independence: means that the outcome of the 1st event cannot influence the outcome of the second event. Ex. flipping coin, once the first toss is recorded, the probability of heads is still 0. 5. Ex. dealing successive cards, probability of first red card is 26/52. Probability of second red card is now 25/51. Knowing outcome of first card changes probability of second. Learning in first test affects performance on second. If a and b are independent: knowing that one occurs doesn"t change the probability that the other occurs, then If this condition is not satisfied, then events are dependent. 2 individuals independently selected from a large population. Probability we assign to event can change if we know that other event is true/has occurred.
