Propositions and Events
Elementary Probability
The Basic Rules
Bayes' Rule
Decision Theory
200

"Either the dog ran around the house or the water was too hot."

What is AvB?

200

Pr(AvB), where A is "Bill strikes out," B is "Bill gets a base hit," Pr(A) = 2/9 and Pr(B) = 3/5.

What is 37/45?

200

This is the definition of conditional probability.

What is if Pr(B) > 0, Pr(A/B) = Pr(A&B)/Pr(B)?

200

The first node in the tree diagram is this scientific term, and the second node in the tree diagram is this judicial term.

What are hypothesis and evidence?

200

Decision theory deals with these three things.

What are options, alternatives, and probabilities?

400

"Either both eating a lemon and eating a pair or both throwing a frisbee and throwing a shotput."

What is (A∩B)∪(C∩D)?

400

Pr(A/B), where B is "choosing urn B," A is "getting an airhead," and urn B contains 10 airheads, 9 mars bars, 5 paydays, 2 almond joys, and 1 box of nerds.

What is 10/27?

400

This is the the rule for overlap.

What is Pr(AvB) = Pr(A) + Pr(B) - Pr(A&B)?

400

This is the first formulation of Bayes' Rule.

What is Pr(H/E) = (Pr(H) * Pr(E/H)/((Pr(H) * Pr(E/H)) + (Pr(~H) * Pr(E/~H)))?

400

This relation between alternatives is asymmetric.

What is the preference relation?

600

These are the circumstances under which a disjunction is true.

What is if and only if either disjunct is true?

600

These are the circumstances under which A and B are mutually exclusive.

What is if and only if A&B must be false?

600

This is the rule for multiplication.

What is if Pr(B) > 0, Pr(A&B) = Pr(A/B) * Pr(B)?

600
This is the generalization of Bayes' Rule.

What is Pr(Hj/E) = (Pr(Hj) * Pr(E/Hj))/Σ(Pr(Hi) * Pr(E/Hi))?

600

This is the principle of rational choice for choice under certainty

What is choose your most preferred alternative?

800

"The complement of both spelling "indisputability" correctly and spelling "hypostatization" correctly"

What is (A∩B)'?

800

Pr(A&B), where A is "getting a 7 on the first dive," B is "getting a 3 on the second dive," Pr(A) = 1/46, and Pr(B) = 1/24.

What is 1/1104?

800

This is the rule for total probability.

What is if 0 < Pr(B) < 1, then Pr(A) = (Pr(B) * Pr(A/B)) + (Pr(~B) * Pr(A/~B))?

800

A test that says there are allergens present when there are not, for instance

What is a false positive?

800

This condition asserts that if aPb and bIc, then aPC.

What is the transitivity condition?

1000

"Either both Tom is not a robin or Tom is not a cardinal and Tom is a robin or Tom is a cardinal or Felix is orange and Felix is not hungry."

((~Av~B)&(AvB))v(C&~D)

1000

Pr(AvB), where A is "it's raining," B is "it's thundering," Pr(A) = 3/7, Pr(B/A) = 5/7, and Pr(B/~A) = 1/7

What is 24/49?

1000

This is the definition of statistical independence.

What is if Pr(A) > 0, Pr(B) > 0, A and B are statistically independent iff Pr(A/B) = Pr(A)?

1000

Pr(H/E), where H is "Denton drinks a soda," E is "Denton hiccups" Pr(H) = 2/7, Pr(E/H) = 8/11, and Pr(E/~H) = 1/11

What is 16/21?

1000
According to this argument, Mary is rational even though she $100 doesn't make the difference between being a scientist or being an astronaut.

What is the small improvements argument?

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