When to apply which discrete statistical distribution?

Statistics is an amazing subject which offers wide variety of statistical distributions to make predictions or to do forecasting. There are some discrete distributions which are defined for discrete random variables like number of telephone calls on a telephone exchange or number of…

Being a Statistician, i always admire the beauty of Statistics subject. Where it helps to forecast sales/profits/losses of an organization, it also helps to keep a check on mental health. Psychological Statistics helps to understand mental conditions and early detection of mental health related issues like depression. Predictive modelling can be used to predict mental health related issues. Psychological tests are designed in a technical way so that their score has a statistical significance as well. Statistics is just amazing!

What is the difference between a statistical model and a mathematical model?

Mathematical models explain functional relationship between y and x in non-random or non probabilistic environment. On the other hand, statistical models explain functional relationship between x and y in stochastic/ random/ probabilistic environment. The error term in a statistical model is responsible for introducing randomness.

Mathematical model: y=b0+b1*X
Statistical model: y=b0+b1*X+e

Where y is response, X is a explanatory variable, e is the error term, bo and b1 are regression coefficients.

Lokesh Sharma

Data Scientist || M.Sc. Statistics (2018) || I like to express my thoughts through my writings.

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