normal binomial or poisson?

NormalBinomial

Or Poisson?

NORMAL

N=NATURAL

O=OSTANDARDDEVIATION

R=REAL LIFECONTINUOUS

M=MEAN

A=AREA UNDER

L= LAMBS An example of the normal curve is

the weight of new born lambs.

Binomial Distribution

Memory trick

bi

no

mi

al

biMeans two

There are TWO possible outcomesSuccess or Failure

noNo. stands for numberThere are a fixed number of identical trials.

Discrete – bar graph not histogram!

miMi sounds like me.

Me? I am dependent on no one!I am independent!

alAdd another l to get All

All trials have the SAME probabilityConstant 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.

BPDBinomial Probability Distribution

Exactlya certain number (x) of successful trials

BCDBinomial Cumulative Distribution

Up to and includinga certain number (x)of successful trials

PPDPoisson Probability Distribution

Exactlya certain number (x)

of “occurrences of the event” with no upper limit

PCDPoisson Cumulative Distribution

Up to and includinga certain number (x)

of occurrences of the event

NormalBinomial

Or Poisson?