Published the first work of important statistics.

Developed the use of simple averages.

Helped Fermat solve the dice problem (how many times one must throw a pair of dice before one expects a double six).

Wrote and published papers on probability. He also developed the Bernoulli trials (success or failure).

Wrote the Analytical Theory of Probabilities. This consisted of two books; generating functions and approximations and defining probability.

Wrote papers on statistical methods such as the least squares method.

Wrote a paper on the laws of birth vs. mortalities.

Pioneer of statistical correlations and regression.

Known as the father of Statistics. He developed the Chi-Square test.

Developed the t-test (to handle small sample quantities for quality control).

Contributed majorly to experimental design and analysis.