Answer:
The dependent variable
Explanation:
There are two types of variables used in statistical analysis. The dependent variable and the independent variable.
The dependent variable are those ones whose value depends by rule on the values of other variables.
Independent variables are those whose vales are not dependent on the values of other variables.
In this scenario the independent variables under study are those that suffer insomnia and those that sleep well.
The dependent variable is the number of leisure hours.
Number of leisure hours varies with the group the participants are in.
For example leisure hours can be 3 hours for insomniacs and 6 hours for those that sleep well.