The degrees of freedom in statistics they are the number of independent components of a random vector. If the vector has n components and there are p ...
A bar graph, Also called a bar chart, it is a way of representing data, values or frequencies that are related to each other, using vertical or hori...
The sampling error or sample error In statistics, it is the difference between the mean value of a sample and the mean value of the total population. ...
The rank, distance or amplitude, in statistics, is the difference (subtraction) between the maximum value and the minimum value of a set of data from ...
The Mann-Whitney U test It is applied for the comparison of two independent samples when they have few data or do not follow a normal distribution. In...
The statistical variables They are characteristics that people, things or places have and that can be measured. Examples of frequently used variables ...
The ungrouped data are those that, obtained from a study, are not yet organized by classes. When it is a manageable number of data, usually 20 or less...
The grouped data are those that have been classified into categories or classes, taking their frequency as a criterion. This is done in order to simpl...
Two events are independent, when the probability of one of them happening is not influenced by the fact that the other occurs -or does not occur-, con...
