A Medical Researcher Wondered If There Is a Significant Difference $$\begin{array} { l l l l l l } \text { Boys } & 8.0 & 4.7 & 7.3 & 6.2 & 3.4 \\\text { Girls } & 5.3 & 2.8 & 6.4 & 6.8 & 7.4\end{array}$$

Multiple Choice

A medical researcher wondered if there is a significant difference between the mean birth weight of boy and girl babies. Random samples of 5 babies' weights (pounds) for each gender showed the following: $$\begin{array} { l l l l l l } \text { Boys } & 8.0 & 4.7 & 7.3 & 6.2 & 3.4 \\\text { Girls } & 5.3 & 2.8 & 6.4 & 6.8 & 7.4\end{array}$$ To test the researcher's hypothesis, we should use the:

A) paired (dependent) samples t-test.
B) independent samples t-test.
C) large-sample z-test.
D) t-test for correlation.