a.
Dependent variable = Exaam score
Independent variable = Types of stress that influence exaam score
This variable has 3 levels namely physical stress, emotional stress, stress after listening music.
b.
Dependent variable = Tea rating
Independent variable = color of tea
This variable has 3 levels namely red, brown and orange.
c.
Dependent variable = Heart rate
Independent variable = type of music.
This variable has 4 levels namely no music (quite room), loud and heavy music, classical soothing music and upbeat pop music.
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