Normal Binomial Or Poisson?
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NormalBinomial
Or Poisson?
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NORMAL
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N=NATURAL
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O=OSTANDARDDEVIATION
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R=REAL LIFECONTINUOUS
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M=MEAN
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A=AREA UNDER
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L= LAMBS An example of the normal curve is
the weight of new born lambs.
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Binomial Distribution
Memory trick
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bi
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no
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mi
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al
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biMeans two
There are TWO possible outcomesSuccess or Failure
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noNo. stands for numberThere are a fixed number of identical trials.
Discrete – bar graph not histogram!
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miMi sounds like me.
Me? I am dependent on no one!I am independent!
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alAdd another l to get All
All trials have the SAME probabilityConstant probability!
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How do I spot it?
Check each of the four conditions.You will be given, or be able to calculate the
probability p.You will be given the number of trials.
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BPDBinomial Probability Distribution
Exactlya certain number (x) of successful trials
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BCDBinomial Cumulative Distribution
Up to and includinga certain number (x)of successful trials
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PPDPoisson Probability Distribution
Exactlya certain number (x)
of “occurrences of the event” with no upper limit
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PCDPoisson Cumulative Distribution
Up to and includinga certain number (x)
of occurrences of the event
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NormalBinomial
Or Poisson?
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