1. What is the main purpose of probability in studying a random experiment?
2. What does a conditional probability calculation do to the reference universe?
3. How is a marginal frequency in a contingency table computed?
Probability — purpose?
Quantify likelihood of outcomes.
Contingency table — frequencies?
Counts or proportions of characteristics.
Experiments and events — vocab?
Experiments produce outcomes; events are outcome sets.
Conditional probability — definition?
Probability of A given B: P(A∩B)/P(B).
Weighted trees — function?
Represent sequential choices with probabilities.
Total probability — formula?
P(A)=P(A∩B)+P(A∩B̄).
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