假设检验的一般步骤包括（）。

A.设计

B.建立假设

C.选择检验方法

D.确定P值

E.得出结论

The primary driver behind the demand for continual quality improvement is ______ .

A．an increase in the number of the projects being worked

B．widespread public interest in government cost improvement reports

C．the prevalence of media reports on quality circles and other quality improvement

D．the need to reduce the cost and ensure the performance of products