问题
单项选择题
Which of the following statements about hypothesis testing is FALSE（）
A. The null hypothesis is a statement about the value of a population parameter.
B. A Type Ⅱ error is failing to reject a false null hypothesis.
C. If the alternative hypothesis is Ha: μ＞μ0, a two - tailed test is appropriate.
答案
参考答案：C
解析：
The hypothesis are always stated in terms of a population parameter. Type Ⅰ and Type Ⅱ are the two types of errors you can make - reject a null hypothesis that is true or fail to reject a null hypothesis that is false. The alternative may be one - sided ( in which case a ＞ or ＜ sign is used) or two -sided (in which case a ≠ is used).