Combined mean of groups

1. A.
   $\bar{x}_1 < \bar{x} < \bar{x}_2$
2. B.
   $\bar{x} > \bar{x}_2$
3. C.
   $\bar{x} < \bar{x}_1$
4. D.
   $(\bar{x}_1 - \bar{x}) + (\bar{x}_2 - \bar{x}) = 0$

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1. A.
   2.14
2. B.
   2.25
3. C.
   2.37
4. D.
   2.50

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