—_____ notebook is that?            

—It could be _____, she likes books in pink.           [ ]

A. Whose; Mary's

B. Whose; Mary

C. What; Mary's

两样本均数比较的假设检验，按α＝0.05水准，认为差异有显著性，此时若推断有错，其错误的概率是

A．大于0.05

B．小于0.05

C．等于0.05

D．β，而具体数值未知

E．1-β