朱同学2021-01-02 10:25:02
老师,这道题没听懂,讲课老师说得太快了
回答(1)
Evian, CFA2021-01-04 10:08:03
└(^o^)┘你好同学,
Which of the following statements about hypothesis testing is correct?
A The null hypothesis is the condition a researcher hopes to support.
不是原假设,应该是备择假设
B The alternative hypothesis is the proposition considered true without conclusive evidence to the contrary.
当没有证据表明原假设是错误的情况下,备择假设被认为是正确的。
应该是:当有证据表明原假设是错误的情况下,备择假设被认为是正确的。
C The alternative hypothesis exhausts all potential parameter values not accounted for by the null hypothesis.
备择假设包含了所有那些原假设没有考虑到的参数值。
例如,原假设为u=0,备择假设为u不等于0,此时u的范围是从负无穷到正无穷
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