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问题 单项选择题

确定假设检验的检验水准后，同一资料（）。

A．单侧t检验显著，则双侧t检测必然显著

B．双侧t检验显著，则单侧t检测必然显著

C．双侧t检测不显著，则单侧t检验也不显著

D．单侧t检测不显著，则双侧t检验也不显著

E．单、双侧t检验结果没有联系

答案

参考答案：B

写作题
请阅读Jennifer的来信，仿照下面的范文替John或Mary写一封自荐信。

Dear Mr. Black,
     I'm Jennifer, a 16-year-old girl. I want to be a volunteer. I like fixing up things, so I can help fix up toys for kids in an elementary school.
                                                                                                              Jennifer
Dear Mr. Black,
                                                                                                                         
                                                                                                                         
                                                                                                                         
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选择题

Give a hand if possible and these people in the flooded are as ________ our help. [ ]

A. desire  

B. determine

C. decide  

D. deserve
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