Review — Difficulty 2/10

Probability · Random variables

Review skills for this standard. Write answers where shown.

Together with a parent

1. P(A) = 0.55, P(B) = 0.65. If independent, P(A∩B) = ___ 2. Binomial(n=10, p=0.5): P(X = 7) = ___ 3. E[X] for X with values {6, 8, 10} and equal probability ___

Written review

1. P(A) = 0.65, P(B) = 0.75. If independent, P(A∩B) = ___ 2. Binomial(n=12, p=0.5): P(X = 9) = ___ 3. E[X] for X with values {8, 10, 12} and equal probability ___ 4. Variance of a fair die roll: ___ 5. Conditional: P(A|B) when P(A∩B) = 0.24000000000000002 ___ 6. Identify the distribution and parameters in context.

_See printable PDF for diagram._

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Skills checklist

• [ ] Computes probabilities from models
• [ ] Finds expectation and variance

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