Poisson distribution is a discrete distribution and is used in statistical work. This distribution is used to describe the behavior of rare events. This is expected in cases where the chance of any individual event being a very small success such as no of accidents on road, printing mistakes on a paper.
Normal distribution– normal distribution is used in continuous series in this distribution value of z is find out and
Z= X – mean / S.D.
Properties of normal distribution-
- Normal distribution is bell shaped.
- It is perfectly symmetrical about mean.
- This is unimodal means it has one modal.
- Mean median and mode are equal in normal distribution.
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