Math and Stat

Important properties of the Normal distribution

The normal distribution was first described by Abraham Demoivre (1667-1754) as the limiting form of binomial model in 1733. Normal distribution was rediscovered by Gauss in 1809 and by Laplace in 1812. Both Gauss and Laplace were led to the distribution by their work on the theory of errors of observations arising in physical measuring processes particularly in astronomy. Here …

Some Key Abbreviations used in Statistics

FNR – False Negative Ratio FPR – False Positive Ratio iff  – if an only if i.i.d. – independent and identically distributed IRQ – inter-quartile range pdf – probability density function LSE – Least Square Error ML – Maximum Likelihood MSE – Mean Square Error PDF – probability distribution function RMS – Root Mean Square Error r.v. – Random variable …

What’s new in Gretl2017a

Gretl is a free and open source package for econometric analysis on 15-04-2017 updated version gretl2017a was released. The following are the new features, bug fixes and change log of new version. Improved parsing for the member-of relation, on both the left- and right-hand side of hansl statements Calendar: ensure that the Gregorian calendar is used consistently but add some …

Indian and international number system–explained

It is common people confuse between lakhs and millions, and crores and billions. So its common question people ask .  how many lakhs makes a million? Well, I present you clear answer here. Indian number system use terms such as ones, tens, hundreds, thousands and then lakhs and crores. While International number system use terms such as ones, tens, hundreds, …

List of Greek alphabets, name ,Pronunciation and its English equivalent

The Greek alphabets have been used to write the Greek language since the 8th century BC. Here is a list of alphabets, its name , How it is pronounced and What is its English equivalent that is used in Maths and statistics. Don’t forget to subscribe the blog for more interesting updates. Upper Case Lower Case Greek Letter Name English …