QUANTITATIVE VARIABLE

The symbol that appears in propositions, algorithms, formulas and functions and that takes different values ​​is called a variable . According to their characteristics, it is possible to distinguish between different classes of variables.

Quantitative variable

The quantitative variables are those that adopt numerical values (ie, numbers). In this way they differ from qualitative variables , which express qualities, attributes, categories or characteristics.

It is important at this point that we proceed to know the etymological origin of the two words that give shape to the term that concerns us:
-Variable comes from Latin, specifically derived from "variabilis", which can be translated as "that can change its appearance" . It is the result of the sum of two components: the verb "variare", which is synonymous with "change of appearance", and the suffix "-able", which is used to indicate possibility.
-Quantitative, for its part, comes from Latin as well and is made up of the union of various elements of that language: “quantum”, which is equivalent to “how much”, and the suffix “-tive”. This is used to come to record a passive or active relationship.

In the set of quantitative variables, we can also recognize several types of variables. The variables Continuous quantitative can take any value within a certain range. According to the precision of the instrument that performs the measurement, there may be other values ​​in the middle of two values. The height of a person, for example, is a continuous quantitative variable (they can be values ​​such as 1.70 meters , 1.71 meters , 1.72 meters , etc.).

With regard to continuous quantitative variables, we can establish that other simple examples would be the mass of any object or the height of a building.

The discrete quantitative variables , on the other hand, acquire values that are separated from each other on the scale. In other words: there are no other values ​​among the specific values ​​that the variable acquires. The number of pets a person has is a discrete quantitative variable: a woman can have 2 , 3 or 4 dogs , but never 2.5 or 3.25 dogs . In this case, 2 and 3 are values ​​that the variable is able to adopt, without there being any other possible value in the middle of both.

Other examples of discrete quantitative variables can be these:
-The number of children a person has.
-The number of animals that a farmer owns.
-The set of vehicles that exist in a dealer.

Both types of quantitative variables can be combined in a survey or in an interview . The applicant for a job may be asked how much he weighs (continuous quantitative variable) and how many children he has (discrete quantitative variable).

In addition to all the above, it is important to know another series of interesting data about quantitative variables, such as the following:
-As a general rule, when graphing them, we choose to make use of integral diagrams and differential diagrams, which They are the ones used to show the so-called relative frequencies.
-In the same way, you can also resort to using what are bar charts.

Comments

Post a Comment

Popular posts from this blog

Down

Abajo is an adverb that is very frequently used in our language. The term can refer to that or that which is located in a lower place with respect to another thing or individual. For example: " The pink shirt is stored in the bottom drawer, not that one " , " My grandmother lives downstairs: I'm on the fifth floor and she is on the fourth " , " I'm going to put the boxes underneath out of bed ” . The notion below also refers to what advances or goes to a lower sector , or what ranks lowest in comparison with something that lies higher up: " The owner of the cottage intends to take the tree down, but Neighbors are opposed ” , “ Due to the overturn, the driver was left with his head down ” , “ We will have to walk an hour downhill to get to the shelter ” . In certain texts , the mention below allows to allude to something that will appear next and that will be noticed once the reading progresses. A statement can begin by saying " The und
Read more

VARIABLE

Image
Derived from the Latin term variabilis , variable is a word that represents that which varies or is subject to some type of change. It is something that is characterized by being unstable , fickle and changeable . In other words, a variable is a symbol that identifies an unspecified element within a certain group. This set is usually defined as the universal set of the variable ( universe of the variable , on other occasions), and each piece included in it constitutes a value of the variable. For example: x is a variable in the universe { 1 , 3 , 5 , 7 }. Therefore, x can be equal to any of the values ​​just mentioned, with which it is possible to replace x with any odd number that is less than 8 . As you can see, variables are elements present in formulas, propositions and algorithms, which can be substituted or can acquire, without ceasing to belong to the same universe, different values. It is worth mentioning that the values ​​of a variable can be framed wit
Read more