Sublime

On appelle parfois ce principe « loi de Price », en hommage à Derek J. de Solla Price13, le chercheur qui a découvert son application scientifique en 1963.

the tradeoff for working with a manageable sample requires that we account for sample error.

These graphs—often called “cohort retention curves”—are the foundational method for understanding whether a product is working or not.

Evolutionary hypotheses, where one parameter is slightly optimized, have a less profound effect than revolutionary hypotheses, where the approach is fundamentally different. That said, evolutionary hypotheses are more likely to bear fruit.

Z-test – for checking the mean of a normally distributed quantity. Student’s t-test – the same as a z-test, but for small samples (t < 100).

hypothesis tests make assumptions about the data collection process. For instance, these tests assume that the data were collected using a method that tends to produce representative samples.

Laplace continued his research throughout France’s political upheavals. In 1810 he announced the central limit theorem, one of the great scientific and statistical discoveries of all time. It asserts that, with some exceptions, any average of a large number of similar terms will have a normal, bell-shaped distribution.