George E.P. Box (1979) on statistical modelling:

All models are wrong, but some are useful. |

The normal distribution probability density function is defined over all real x, so in principle it cannot be a correct model for the distribution of nonnegative variables such as height, weight, etc. The fact that it is in use and helps us solve practical problems (such as providing a quantitative basis for detecting over and underweight people) is a testament to Box’s insight.

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## About Tsung Fei

A teacher, researcher in the bioinformatics division at the University of Malaya

Well spoken well spoken