The correct statement is-number of students in the data set
In research and data collecting, something that is being measured and whose values can change is referred to as a variable.
Given that we have a range of alternatives from January to December, the aforementioned example demonstrates how the student birth month is a variable. The student's ability to indicate whether they support particular political parties or not makes their political affiliation another variable. Since they are college students, the age of the student is another variable, with replies falling within a range of 20 to 25.
Since students will give different answers, whether they live at the same address or a different one, student address is also a variable.
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