问题如下图：
选项：
A. 
B. 
C. 
解释：
麻烦解释一下选项B和C，谢谢！
菲菲_品职助教 · 2018年09月05日
B选项说的是单尾检验比双尾检验更能反映研究者的信念，也就是说因为单尾检验的备择假设有大于和小于两种情况，而双尾检验的备择假设只是不等于，可能是大于，也可能是小于，没有单尾检验这么明确。这个说法是正确的。C选项是说在显著性水平相同的情况下（即α相同），单尾检验的拒绝点即临界值点的绝对值会比双尾检验更大，这是错误的。比如说当α等于5%时，以Z分布举例，单尾的临界值的绝对值为1.645，而双尾的临界值的绝对值为1.96，所以在显著性水平相同的情况下（即α相同），单尾检验的拒绝点即临界值点的绝对值会比双尾检验更小。C选项错误。
吴卓谦 · 2018年11月09日
但答案说B是错误的呀！
NO.PZ2018062016000124 问题如下 Whiof the following scriptions on a two-tailehypothesis test is least correct? A.A two-tailetest is less rective tha one-tailetest. B.The alternative hypotheses of one-tailetests hless impacts on the researcher's beliefs ththe alternative hypotheses of two-tailetests. C.Unr the same significanlevel, the absolute value of two-tailetest's rejection points is larger ththe one of one-tailetest. B is correct. A two-tailetest is a “not equto” alternative hypothesis, while a one-tailetest is a “greater than” or “less than” alternative hypothesis. “greater than” or “less than” alternative hypotheses reflethe beliefs of the researcher more strongly tha \"not equto\" alternative hypothesis. the absolute value of two-tailetest's rejection points is larger ththe one of one-tailetest.--这句话怎么理解， rejection points 是 criticvalue那个点吗， 单尾和双尾是不同的假设，是基于什么前提假设比较这两个tests 的rejection points
NO.PZ2018062016000124问题如下Whiof the following scriptions on a two-tailehypothesis test is least correct?A.A two-tailetest is less rective tha one-tailetest. B.The alternative hypotheses of one-tailetests hless impacts on the researcher's beliefs ththe alternative hypotheses of two-tailetests. C.Unr the same significanlevel, the absolute value of two-tailetest's rejection points is larger ththe one of one-tailetest.B is correct. A two-tailetest is a “not equto” alternative hypothesis, while a one-tailetest is a “greater than” or “less than” alternative hypothesis. “greater than” or “less than” alternative hypotheses reflethe beliefs of the researcher more strongly tha \"not equto\" alternative hypothesis.老师，我这样理解是对的吗双尾显著水平5%，置信区间95%；单位显著水平5%，置信区间也应该是95%是吧，但是看其他同学提问下如果解答，感觉是也算上一侧的5%，然后90%得出关键值+-1.65.感觉自己没太弄懂，谢谢！
NO.PZ2018062016000124 问题如下 Whiof the following scriptions on a two-tailehypothesis test is least correct? A.A two-tailetest is less rective tha one-tailetest. B.The alternative hypotheses of one-tailetests hless impacts on the researcher's beliefs ththe alternative hypotheses of two-tailetests. C.Unr the same significanlevel, the absolute value of two-tailetest's rejection points is larger ththe one of one-tailetest. B is correct. A two-tailetest is a “not equto” alternative hypothesis, while a one-tailetest is a “greater than” or “less than” alternative hypothesis. “greater than” or “less than” alternative hypotheses reflethe beliefs of the researcher more strongly tha \"not equto\" alternative hypothesis. 我感觉C 答案也是对的
NO.PZ2018062016000124 问题如下 Whiof the following scriptions on a two-tailehypothesis test is least correct? A.A two-tailetest is less rective tha one-tailetest. B.The alternative hypotheses of one-tailetests hless impacts on the researcher's beliefs ththe alternative hypotheses of two-tailetests. C.Unr the same significanlevel, the absolute value of two-tailetest's rejection points is larger ththe one of one-tailetest. B is correct. A two-tailetest is a “not equto” alternative hypothesis, while a one-tailetest is a “greater than” or “less than” alternative hypothesis. “greater than” or “less than” alternative hypotheses reflethe beliefs of the researcher more strongly tha \"not equto\" alternative hypothesis. 老师这道题的翻译一下吧，看不是很懂
NO.PZ2018062016000124 问题如下 Whiof the following scriptions on a two-tailehypothesis test is least correct? A.A two-tailetest is less rective tha one-tailetest. B.The alternative hypotheses of one-tailetests hless impacts on the researcher's beliefs ththe alternative hypotheses of two-tailetests. C.Unr the same significanlevel, the absolute value of two-tailetest's rejection points is larger ththe one of one-tailetest. B is correct. A two-tailetest is a “not equto” alternative hypothesis, while a one-tailetest is a “greater than” or “less than” alternative hypothesis. “greater than” or “less than” alternative hypotheses reflethe beliefs of the researcher more strongly tha \"not equto\" alternative hypothesis. B的翻译是不是单尾实验对实验者的信仰影响小于双尾实验，那意思就是在单尾实验中实验者更确定自己的偏向对吧？另外题目中的least correct是最不正确的意思对吗？两者是否有冲突？