Bones tend to become brittle with age. A disease called osteoporosis causes bones to become less dense and as a result, bones break more easily.
Osteoporosis is more common among older women, because they produce less
of a hormone called estrogen, which aids in bone formation. Many doctors
hypothesize that older women who take estrogen supplements will experience
fewer broken bones.
Part A: Describe how an experiment could be designed to test this hypothesis.
Part B: What would be the outcome variable (dependent variable)?
Part C: What would be the test variable (independent variable)?