Answer:
independent variable: studying atmosphere
dependent variable: understanding of quiz
Step-by-step explanation:
The independent variable refers to the variables that are directly supplied by the researcher during the course of an experiment whose manipulatory effects are measured on the dependent variable. In other words, independent variables are variables that are directly manipulated during experiments.
The dependent variables on the other hand refer to the main variable a researcher sets out to determine during an experiment. The value of the dependent variable is determined by the inputted independent variable by the researcher.
In the illustration, the manipulated variable is the studying atmosphere of the students - silent atmosphere or atmosphere with the TV switched on. The main variable that the researcher wants to determine is the understanding of the given quiz.
Hence, the independent variable is the studying atmosphere of the students while the dependent variable is the understanding displayed by the student.