Category Statistics

Sin categoría, Statistics

Counting bugs

The geometric mean is used when the values of the data distribution change multiplicatively, and not additively. This makes it ideal for averaging geometric progression data, such as ratios, compound interest in economics, or bacterial growths in microbiology.

Manuel Molina
03/15/2022

Sin categoría, Statistics

A picture is worth a thousand words

There are three possible strategies o verify that a variable follows a normal distribution: methods based on hypothesis testing, those based on graphical representations and the so-called analytical methods.

Manuel Molina
02/22/2022

Sin categoría, Statistics

A tricky riddle

The harmonic mean is the reciprocal of the arithmetic mean. It is calculated as the total number of observations divided by the sum of the reciprocals. It is used in situations in which it is necessary to average paths of equal length with different times, as well as to average multiples or quotients.

Sin categoría, Statistics

A measure with a pedegree

The sample size required to estimate a population mean depends on the desired level of confidence and precision, in addition on the variable’s variance in the population.

Manuel Molina
01/11/2022

Statistics, Step by step

Probability calculations with a normal distribution

Step by Step. Probability calculations with a normal distribution. A series of examples of how to do probability calculations with a normal distribution are shown, as well as the advantages of standardizing the data.

Manuel Molina
08/31/2021