Tech Notes

My notes on Statistics, Big Data, Cloud Computing, Cyber Security

Tag Archives: Variance

Linear Regression, Covariance and Correlation

Linear regression is the relation between variables when the regression equation is linear: e.g., y = ax + b

Linear regression – basic assumptions

  • Variance is constant
  • You are summarizing a linear trend
  • You have all the right terms in the model
  • There are no big outliers Read more of this post

Basic Terms in Statistics (contd 2.) – Glossary

What is Statistics : science of drawing conclusions from data

Types of Statistics

Descriptive Vs Inferential


Descriptive Statistics : Summarizing data with numbers


Mean : Is simply the arithmetic average of a group of numbers.

It is not a robust statistic. Sensitive to extreme values. Instead trimmed mean can be used

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