Tuesday, May 30, 2017
Friday, May 26, 2017
Relation between Binomial, Poisson, Geometric and Negative binomial distributions
A small grocery store in a very busy market square |
The interrelationship between these distributions is illustrated with following example.
Suppose that there is a small grocery store located in a very busy market square with several big stores and shopping malls. Hundreds of people are walking in this market square in a Saturday morning. Then the number of people entering this store is a random variable following Poisson distribution. Number of people making purchases upon their entry into this shop is a random variable following Binomial distribution. Number of people making purchases before a person leaves the shop without buying anything is a random variable following geometric distribution. And lastly the number of people entering the shop before third person makes purchases more Rs. 5, 000/- is also a random variable and follows negative binomial distribution.
In this example, different random variables governed by probability law of different probability mass functions explain different aspects of a purchase in a small shop.
Sunday, May 21, 2017
Statistical Analysis and Modelling of Vital Events
Mortality and Fertility Models for Countries with Limited Data |
My book titled " Mortality and Fertility Models for Countries with Limited Data" is available on Amazon.
It elucidates in a simple manner various methods of data generation, correction, prediction, analysis and interpretation. Here I discuss the statistical analysis of vital events namely Mortality , Fertility and Migration for countries with limited data like Nepal and India.
Various techniques of data correction, data analysis and data prediction can be learnt from this book. There are several examples of vital events from Nepal, India and Germany in this book.
Learn various statistical techniques of data correction, analysis and interpretation |
Friday, May 5, 2017
Tuesday, May 2, 2017
Insights into the Concept of Hypothesis Testing (Part 14)
Alpha decreases beta increases |
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