Abiology student wants to conduct a study of how the amount of sunlight affects the length of sleep for mice. she sets up four cages with a mouse in each cage. what data do you need to collect during this experiment answers

For this experiment, the biology student needs to know the relationship between the amount of sunlight a mice receives and its length of sleep. The data to be collected are the independent variable which would be varied, the amount of sunlight, and the dependent variable, the length of sleep for mice.

Where’s the paragraph?

This is what i did 45-5=4040÷4=10so there are 10 white marbles but am not sure is just a question that am not sure