The researchers would like to know how too much exposure to gadgets affects the eye-sight of 15-year old students. Which of the following is the BEST dependent variable for this problem?

Question

Answer

number of hours the eyes was exposed to gadgets

Answer

eye grade after excessive exposure

Answer

age of students

Answer

number of 15 year-year old students

Crowdly

The researchers would like to know how too much exposure to gadgets affects the ...

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