4. Probabilistic Inference

Unit 4, 1 Probabilistic Inference

Assume: Even though Mary calls to report the Alarm is going off, it might not be going off.  (Mary could be mistaken or lying.)

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Unit 4, 1a Answer

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Unit 4, 2 Enumeration

At 2:40 the summation should be sum_e sum_a p(+b, +j, +m, e, a).

At 3:18 in the video, p(+m, a) should be p(+m | a).

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Unit 4, 2a Answer

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Unit 4, 3 Speeding up Enumeration

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Unit 4, 3a Answer

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Unit 4, 3b Second Question

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Unit 4, 3c Second Answer

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Unit 4, 3d Third Question

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Unit 4, 3e Third Answer

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Unit 4, 3f Fourth Question

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Unit 4, 3g Fourth Answer

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Unit 4, 3h Causal Direction

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Unit 4, 4 Variable Elimination

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Unit 4, 4a Answer

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Unit 4, 4b More Variable Elimination

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Unit 4, 4c Answer

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Unit 4, 4d Even More Variable Elimination

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Unit 4, 4e Answer

The answer for negative l should be 0.866.  The system will count that answer correct.  0.886 in the video is not correct.

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Unit 4, 4f Summary

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Unit 4, 5 Approximate Inference Sampling

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Unit 4, 6 Sampling Example

We are aware there is a technical issue with this specific question related to marking progress.  We will be updating it after Homework 2 is due and your progress display both here and on the Progress page should be fixed after that.

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Unit 4, 6a Sampling Example

We are aware there is a technical issue with this specific question related to marking progress.  We will be updating it after Homework 2 is due and your progress display both here and on the Progress page should be fixed after that.

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Unit 4, 6b More Sampling

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Unit 4, 7 Rejection Sampling

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Unit 4, 8 Likelihood Weighting

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Unit 4, 8a Answer

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Unit 4, 8b Likelihood Weighting is Consistent

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Unit 4, 8c Likelihood Weighting Problems

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Unit 4, 9 Gibbs Sampling

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Unit 4, 10 Monty Hall Problem

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Unit 4, 10a Answer

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Unit 4, 10b Monty Hall Letter

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