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PROBABILITY - Coggle Diagram
PROBABILITY
Probability
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Element of Uncertainty
Often we make statements like
Kuala Lumpur may rain this afternoon.
There is a fair chance that Team A wins the match.
It is unlikely that Anwar Ibrahim becomes the Prime Minister of Malaysia.
Daniel probably is the latest partner of Susan.
When the occurrence of some event is due to the element of uncertainty, it is called a probability statement.
Assessing Probability
- classical probability
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- relative frequency probability
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Important Terms
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Random Experiment – a process leading to an uncertain outcome (the outcome can only be determined in terms of chances/probabilities)
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Probability laws
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Probability Rules
The Addition rule (or):
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If both events are mutually exclusive, i.e. they cannot occur at the same time, then P(AB) = P(A) + P(B)
Classical Probability
If a trial can result in n mutually exclusive, equally likely and exhaustive outcomes and out of which m outcomes are favourable to an event A,
The probability of event A, denoted by P(A), is then P(A) = m/n
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Tossing a coin, the Sample space S would be {head, tail}
If you get a head from the toss (A={H}), the probability of observing head is P (head)=1/2.
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