Read the hypothesis below and answer the question that follows.
Individuals who smoke will have a higher frequency of developing cancer later in life.
Which of the following would not be a potential extraneous variable for the stated hypothesis?
A. the occurrence of lung cancer in subjects
B. exposure to secondhand smoke
C. the amount of cigarettes smoked per day by subject
D. the number of years as a smoker
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Read the hypothesis below and answer the question that follows.
Individuals who smoke will have a h...
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