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For the following examples, suggest an alternative explanation for the fi nding: a

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For the following examples, suggest an alternative explanation for the fi nding:

a. A researcher fi nds a relationship between use of alcohol and unemployment and concludes that using alcohol causes workers to lose their jobs.

b. A researcher fi nds that the proportion of the population confi ned to mental hospitals for manic-depression is greater in the United States than it is in England. He concludes that the American environment is more conducive to the development of depression.

c. A researcher fi nds that the increase in the use of cell phones in recent years has been accompanied by an increase in the incidence of brain tumors. He concludes that using a cell phone can result in a brain tumor