Normal Binomial Or Poisson?.

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Presentation transcript:

Normal Binomial Or Poisson?

normal

N=natural

O=O STANDARD DEVIATION

R=Real life continuous

M=Mean

A=area under

An example of the normal curve is the weight of new born lambs. L= lambs An example of the normal curve is the weight of new born lambs.

Binomial Distribution Memory trick

bi

no

mi

al

Means two There are TWO possible outcomes Success or Failure bi Means two There are TWO possible outcomes Success or Failure

no No. stands for number There are a fixed number of identical trials. Discrete – bar graph not histogram!

Mi sounds like me. Me? I am dependent on no one! I am independent!

All trials have the SAME probability Add another l to get All All trials have the SAME probability Constant probability!

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.

BPD Binomial Probability Distribution Exactly a certain number (x) of successful trials

BCD Binomial Cumulative Distribution Up to and including a certain number (x) of successful trials

PPD Poisson Probability Distribution Exactly a certain number (x) of “occurrences of the event” with no upper limit

PCD Poisson Cumulative Distribution Up to and including a certain number (x) of occurrences of the event

Normal Binomial Or Poisson?