Kapitel 4 Flashcards

1
Q

What is a sample space?

A

Alla möjliga outcomes av ett experiment.

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2
Q

What is a sample point?

A

Ett enskilt outcome.

Tex att få en sexa när man kastar en tärning.

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3
Q

There are 3 diffrent counting rules, which?

A
  1. Multi-step experiment.
  2. Combinations
  3. Permutation
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4
Q

How do you compute multi-step

A

n1 x n2 x nk

n1= possible results for the first step.

n2= possible results for the second step.

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5
Q

Explain Counting rule combinations:

A

När man ska n objekt från N objekt.

Combination= Alwa, bronkan Axel, men bronkan Alwa Axel är samma kombination.

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6
Q

Explain counting rule permutation.

A

När man tar n objekt från N objekt.

Ordningen är dock viktig här.

Bronkan, alwa, axel och axel, alwa bronkan är inte samma sak.

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7
Q

Explain classical method:

A

alla utfall är lika sannolika.

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8
Q

Explain Relative frequency method:

A

Bygger på observationer och historisk data.

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9
Q

Explain Subjective method:

A

Bygger på expertbedömning eller personlig uppfattning.

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10
Q

What is an “event”?

A

Ett eller flera utfall.

“a collection of sample points”

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11
Q

Vad innebär “complement of A”.

Hur förkortas det

A

Alla utfall som inte ingår i A.

Förkortas med ett A och ett streck över.

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12
Q

Explain union of events and intersection of events

A

Union of events:
A U B: A or B or both.

Intersection of events:
A n B: All sample points that is both in A and B.

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13
Q

Explain mutally exclusive:

A

A n B=0

Sannolikheten att A och B sker samtidigt är 0

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14
Q

Explain Conditional probability:

A

Sannolikheten att A inträffar om vi vet att B redan har inträffat.

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15
Q

What does joint probability say?

A

Visar hur ofta två händelser sker samtidigt

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16
Q

Explain shorty bayes theory:

A

Hjälper oss att uppdatera sannolikhet när vi får ny information.