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An introduction to the most useful special and environment variables in Bash

If you're writing a Bash script, you will invariably need to pass values to it—aka arguments or positional parameters. Bash's ...
BBC

Planning experiments and variables

In science, a variable is something that can be changed, measured or controlled in an experiment. Scientists look at variables to understand how they affect things. A variable is any one of the things ...
Investopedia

Covariance: Definition, Formula, Types, and Examples

Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...
Nature

Problems of correlations between explanatory variables in multiple regression analyses in the dental literature

Acquire an understanding of the concepts surrounding 'collinearity'. Appreciate the indications and symptoms of collinearity in multivariable regression. Become aware of the available diagnostic tools ...