A Double entry box Or double-entry matrix is a table that helps to organize and equate knowledge. They serve to be able to contrast several elements referring to the same subject.
Thanks to this system can be systematized certain information in horizontal and vertical columns. These columns serve to describe and relate the information collected to the information that is to be illustrated in the table.
The number of columns in the table may vary; The important thing is that a comparison can be made between the different elements of the same.
The double entry box stops both columns and rows; This means that you have to diagram the information both horizontally and vertically.
Columns and rows should refer to a particular definition, meaning they should symbolize some important piece of information as an idea or concept.
The main characteristic of this type of matrix is that the elements can be interlaced with each other, to be able to form cells where the information to be displayed will be located.
Through the double-entry table, the information can be compared in a system that is squared. Arrays may have two or more columns, depending on the subject and the author.
Elaboration of a double entry table
Before making a chart, you must have very clear information to be placed in it. For that reason, it is important to be informed and read the relevant information.
In this way, it will be possible to discern what will be the variables and elements that will be placed in the double entry box.
It is also important to emphasize that the best way to distribute matrix data must be found in order to achieve greater understanding and analysis.
To create a double entry table, you must first select which variable will be placed in the top horizontal row.
On the other hand, in the column on the left side and vertically, each of the variables will be placed, describing the values.
Later, a path must be taken to create a grid. These lines must create divisions, so that the comparison between the different variables can be created.
The idea is to be observed when the variables are found when they coincide in the same table. For this reason, these matrices have the ability to serve as large models of analysis and serve a great purpose in statistical studies.
List of examples of double entry boxes
1- Children in sports classes
Thanks to this table you can analyze and you can respond quickly to several questions related to this topic.
For example, you can know the number of children in total, how many sports are practiced, how many children practice basketball, how many practice baseball, and how many practice soccer.
You can also answer which is the sport less practiced and which is the sport most practiced by children.
You can also find out who are the kids who play basketball, who practice baseball and who practice soccer.
2- Student Report Card
Many of the report cards that are given to parents in schools are an example of double-entry tables. In this case, the first row is dedicated to the grades or classifications: Very good, good, sufficient and needs improvement.
On the other hand, in the column can be observed the different classes of the school, in this case they include: Language, mathematics, social sciences and natural sciences.
In this way it is possible to read the table and observe that the best subjects of the student are language and mathematics, followed by the social sciences. According to the table, the natural sciences would be the worst subject of the student.
3- Vertebrate animals of the nature
In this double-entry table on vertebrate animals, a comparison can be made between the different types and characteristics of these animals.
For example, in the row can be found the different animals that will be compared; In this case are the fish, amphibians, reptiles, birds and mammals.
In the column they appear the characteristics of the same, here they would be: how is covered its body, breathing, circulation, heart, half life, reproduction, locomotion and photos of the animals.
This makes it easy to compare the different characteristics of vertebrate animals.
For example, it can be observed that birds, reptiles, and amphibians are oviparous. While mammals are viviparous and fish may be both oviparous and ovoviviparous.
One can also easily see that both mammals, birds and reptiles have lung breathing; While the fish breathe through the gills and the amphibians breathe cutaneous, gill and pulmonary.
4- Professions exercised by sex in a population sample
In this table of professions classified according to the sex of the people who exercise them, the number of men and women who have certain professions can be observed.
It is possible to know that in this sample of population in this particular region, there are five women policemen and six police men.
In contrast, there are four firemen against three female firefighters. Finally, it can be seen that there are six women in the military profession, in contrast to only two men in the military area.
Thanks to this collection of information, the two-entry box ends up being quite useful when it comes to creating statistics on certain research.
P For that reason, are often used in the statistical area and in research studies.