Researchers hypothesized that stress was a risk factor for depression among college students. the correlation between stress and depression that they found in their cross-sectional study was consistent with the hypothesis. which is a possible threat to the internal validity of this study?

The time period of the growth of factories and work done by machines was known as a.) rise of mechanization b.) growth of industry c.) enclosure act d.) industrial revolution

As with any small island country, cuba has fewer natural resources than countries such as brazil. this affects their economy in that cuba a) exports only manufactured products. b) exports more products than it imports.. c) must import more products than it exports. d) has imposed trade barriers against the united states.

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