Data are collected on the 35 students in a history course. Which of the following is not a variable of the data set ?
A-student birth month
B-political affiliation of student
C-student age
D-student address
E-number of students in the data set
Which one has nothing to do with the class?
E. the number of students in the data set is not considered data that they are collecting. All the others are either quantitive or categorical variables.
The variable that is not part of the data set is E - number of students in the data set. This is because the number of students is a constant and does not vary within the data set. The other options (A, B, C, D) are all variables that can differ among the students.
To determine which of the options is not a variable in the given data set, we need to understand what a variable is. In statistics, a variable is a characteristic or attribute that can take on different values for different individuals or objects.
Let's analyze each option to see if it fits the definition of a variable:
A) Student birth month: This option represents a characteristic that can vary for each student in the data set. For example, one student may have been born in January, while another may have been born in June. Therefore, this option represents a variable.
B) Political affiliation of student: This option also represents a characteristic that can vary for each student. Students may have different political affiliations such as Democrat, Republican, Independent, etc. Thus, this option also represents a variable.
C) Student age: Similar to the previous options, student age can vary among the 35 students. For example, one student may be 18 years old, while another student may be 20 years old. Therefore, this option represents a variable.
D) Student address: This option represents the physical location of each student. However, in the given context, it is unlikely that the address would vary within a single data set. The address is typically a fixed attribute for each student, rather than a characteristic that can take on different values. Therefore, the student address is not a variable.
E) Number of students in the data set: This option represents the total count of students in the data set. It is not a characteristic or attribute of each individual student; instead, it describes the overall size of the data set. Therefore, the number of students in the data set is not a variable.
So, the answer to the question is D) student address, as it is the only option that does not represent a variable in the given data set.