https://www.scribbr.com/methodology/types-of-variables/
Learn how to identify and classify variables in statistical research based on data type and experiment role. See examples of quantitative, categorical, independent, dependent, and other types of variables with a salt-tolerance experiment.

https://www.thoughtco.com/understanding-variables-in-science-609060
Learn what a variable is in science and how to identify different types of variables in an experiment. Find out the difference between independent, dependent, controlled, and extraneous variables and how to record their attributes.

https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:foundation-algebra/x2f8bb11595b61c86:intro-variables/v/what-is-a-variable
Learn how variables are symbols that represent different values in math problems. Watch a video and read questions and answers from other learners about variables.

https://statisticsbyjim.com/basics/what-is-a-variable/
Learn about the definition, types, and roles of variables in statistics. Variables are characteristics of interest that you measure, record, and analyze in experiments or studies.

https://www.scribbr.com/methodology/independent-and-dependent-variables/
Learn how to identify and use independent and dependent variables in experimental and quasi-experimental studies. Find out the types, examples, and tips for manipulating and measuring these variables.

https://www.scribbr.co.uk/research-methods/variables-types/
Learn how to identify and classify variables in statistical research based on data type and experiment role. Find out the difference between quantitative, categorical, independent, dependent, and other types of variables with examples.

https://www.sciencebuddies.org/science-fair-projects/science-fair/variables
Learn what variables are and how to use them in scientific experiments. Find out the difference between independent, dependent, and controlled variables, and see examples of each type.

https://en.wikipedia.org/wiki/Variable_(mathematics)
In mathematics, a variable (from Latin variabilis, "changeable") is a symbol that represents a mathematical object.A variable may represent a number, a vector, a matrix, a function, the argument of a function, a set, or an element of a set.. Algebraic computations with variables as if they were explicit numbers solve a range of problems in a single computation.

https://www.youtube.com/watch?v=tHYis-DP0oU
Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:foun

https://edu.gcfglobal.org/en/statistics-basic-concepts/variables/1/
Learn what variables are and how they are used in statistics. Find out the difference between qualitative and quantitative variables, and discrete and continuous variables, with examples and a video.

https://www.simplypsychology.org/variables.html
Learn the definitions and examples of independent and dependent variables in experimental studies. Find out how to operationalize variables and test hypotheses with activities.

https://www.merriam-webster.com/dictionary/variable
Learn the meaning of variable as an adjective and a noun, with synonyms, examples, and word history. Find out how variable is used in mathematics, science, and grammar.

https://researchmethod.net/variables-in-research/
Learn what variables are in research and how they are classified, measured, and analyzed. Find out the different types of variables, such as independent, dependent, mediating, moderator, and more, with examples and methods.

https://www.splashlearn.com/math-vocabulary/algebra/variable
Learn what a variable is in math, how to identify dependent and independent variables, and how to solve equations with variables. Explore examples, practice problems and games on variables at SplashLearn.

https://stattrek.com/descriptive-statistics/variables
Qualitative vs. Quantitative Variables. Variables can be classified as qualitative (aka, categorical) or quantitative (aka, numeric).. Qualitative. The value of a qualitative variable is a name or a label. The color of a ball (e.g., red, green, blue) or the breed of a dog (e.g., collie, shepherd, terrier) would be examples of qualitative or categorical variables.

https://www.verywellmind.com/what-is-a-variable-2795789
By systematically changing some variables in an experiment and measuring what happens as a result, researchers are able to learn more about cause-and-effect relationships. The two main types of variables in psychology are the independent variable and the dependent variable. Both variables are important in the process of collecting data about

https://www.iedunote.com/variables
Learn what variables are and how they vary in different research contexts. Explore the 11 types of variables, such as qualitative, quantitative, discrete, continuous, independent, dependent, and more.

https://en.wikipedia.org/wiki/Dependent_and_independent_variables
Dependent variables are studied under the supposition or demand that they depend, by some law or rule (e.g., by a mathematical function ), on the values of other variables. Independent variables, in turn, are not seen as depending on any other variable in the scope of the experiment in question. [a] In this sense, some common independent

https://libguides.usc.edu/writingguide/variables
These variables are expected to change as a result of an experimental manipulation of the independent variable or variables. It is the presumed effect. Independent Variable The variable that is stable and unaffected by the other variables you are trying to measure. It refers to the condition of an experiment that is systematically manipulated

https://www.dictionary.com/browse/variable
Variable definition: apt or liable to vary or change; changeable. See examples of VARIABLE used in a sentence.

https://www.bbc.co.uk/bitesize/articles/zyc9r2p
Learn what variables are and how to identify them in experiments. Find out the difference between independent, dependent and control variables, and how to make predictions and test them.

https://dictionary.cambridge.org/dictionary/english/variable
Learn the meaning of variable as an adjective, noun, and symbol in mathematics, science, and business. Find out how to use variable in sentences and collocations with synonyms and antonyms.

https://www.geeksforgeeks.org/variables-programming/
Learn about variables in programming, their types, declarations, initialization, naming conventions, and scope. See examples in C++, Java, Python, C#, and Javascript.