问题如下：
Which of the following statements about hypothesis testing is correct?
选项：
A. The null hypothesis is the condition a researcher hopes to support.
B. The alternative hypothesis is the proposition considered true without conclusive evidence to the contrary.
C. The alternative hypothesis exhausts all potential parameter values not accounted for by the null hypothesis.
解释：
C is correct.
Together, the null and alternative hypotheses account for all possible values of the parameter. Any possible values of the parameter not covered by the null must be covered by the alternative hypothesis (e.g., H0: θ ≤ 5 versus Ha: θ > 5).
b选项直译:备择假设是对的，除非有绝对的证据，证明它是错的。这个话也不对吗？？？仅仅因为这句话是跟着原假设的解释，就错了？
