428 Slices
Medium 9781576336281

Variation: COOP-HSPT Algebra

Ace Academics Ace Academics ePub
Medium 9781576336830

Percents: Praxis I Arithmetic

Ace Academics Ace Academics ePub
Medium 9788131807781

qtc18-1

N.P.Bali; P.N.Gupta; Dr C.P.Gandhi Laxmi Publications PDF

18

Poisson Distribution

18.1. INTRODUCTION

The Poisson distribution is also a discrete probability distribution. This was discovered by French mathematician Simon Denis Poisson (1781�1840) in the year 1837. This distribution deals with the evaluation of probabilities of rare events such as ��number of car accidents on road��, ��number of earthquakes in a year�, ��number of misprints in a book�� etc.

18.2. CONDITIONS FOR APPLICABILITY OF POISSON DISTRIBUTION

The Poisson distribution is derived as a limiting case of the binomial distribution. So, the conditions for the applicability of the Poisson distribution are same as those for the applicability of

Binomial distribution. Here the additional requirement is that the probability of �success� is quite near to zero.

18.3. POISSON VARIABLE

A random variable which counts the number of successes in a random experiment with trials satisfying above conditions is called a Poisson variable. If the probability of an article being defective is 1/500 and the event of getting a defective article is success and samples of 10 articles are checked for defective articles, then the possible values of Poisson variable are 0, 1, 2, ......, 10.

See All Chapters
Medium 9781576336397

Equations with Several Variables: GED Algebra

Ace Academics Ace Academics ePub
Medium 9781576336830

Square Roots and Powers: Praxis I Arithmetic

Ace Academics Ace Academics ePub

See All Slices