Mathematics, 06.10.2019 04:01 bri9263

In order to determine if living next to high-voltage power lines increases your chance of getting cancer, researchers selected several homes at random, determined if they were within 50 yards of a high-voltage power line, and recorded if anyone in the home had cancer. they compared the proportion of cancer cases in homes within 50 yards of a high-voltage power line with the proportion of cancer cases in homes more than 50 yards from a high-voltage power line. this is
a. an observational study
b. an experiment, but not a double -blind experiment
c. a matched pairs experiment

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