Book Edition | 9th Edition |
Author(s) | McCabe, Moore |
ISBN | 9781319013387 |
Publisher | Macmillan Publishing, Inc |
Subject | Math |
Cases are the objects that the given set of data is about.
The objects in question are the 38 students in a class on introductory statistics and the ones using Facebook will be studied upon for certain outcomes.
So, the cases under study are the students
students
A variable is defined as the characteristic of a case.
The students in the class who are Facebook users are asked to provide the number of their Facebook friends and the average time spent per week on Facebook. These two variables serve as the characteristics of the students and hence by definition, classify as the variables in the data set.
Number of Facebook friends and average time spent by the students on Facebook per week
The numerical values for which some arithmetic calculation can be done are known as quantitative variables.
For the first variable, number of Facebook friends, the only suitable type of value is numerical.
For the second variable, average time spent by the students on Facebook per week, the corresponding entries are in the form of hours or minutes, which are again numerical in nature.
Since both the variables have values on which arithmetic operations could be performed, as and when required, the variables classify as quantitative.
Quantitative
Both the variables have numerical values on which arithmetic operations can be performed.