Statistics Test 4 Johnson

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Statistics

Probability

12th

Mutually Exclusive means...

...events can't happen at the same time.

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Independent means...

...one event has no effect on the other.

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You can show Independence by...

...showing P(A) equals (A/B) or by showing the P(A) times the P(B) is equal to the P(A and B)

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A tree diagram contains...

...P(A), P(A/B), and the P(A and B)

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When finding the P(A or B)...

...consider subtracting any "overlap"

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Use the "Multiplication Principle" to...

...find the total outcomes

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Complementary events ...

...always add up to 1.

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Raining and Not Raining

Complementary Events

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None and At Least One

Complementary Events

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You can only multiply the P(A) times the P(B) if ...

...the events are independent.

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