Null and Alternative Hypotheses

Joychap

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Joined
Oct 18, 2011
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Can somebody please help me with the following word problem? I am confused and don't know how to figure it out.

A researcher believes that family size has increased in the past decade in comparison to the previous decade- that is, people are now having more children than they were before. What are the null and alternative hypotheses in a study designed to assess this? Is this a one-tailed hypotheses test or two-tailed hypotheses test?
 
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