Published the first work of important statistics.
Helped Fermat solve the dice problem (how many times one must throw a pair of dice before one expects a double six).
Developed the use of simple averages.
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.