问题 单项选择题 A型题

经方差分析,若P<α,则结论是()

A.各样本均数全相等

B.各样本均数不全相等

C.至少有两个样本均数不等

D.至少有两个总体均数不等

E.各总体均数全相等

答案

参考答案:D

解析:任何的假设检验都是推断总体,方差分析对两个或多个样本均数比较时,目的就是要推断两个或多个样本均数所代表总体均数的情况。若P<α,即为小概率事件,有理由认为至少有两个总体均数不等。

阅读理解

“You'll have to take care of the baby today,” a woman told her husband. "I'm not feeling well."

"Then you must stay in bed and rest, dear" her husband said. "I'll be pleased to look after our baby." "By the way, shall I do the shopping for you as well?” her husband asked.

The woman was very glad and said, "That will help me very much. I'll give you a list of things to buy"

She wrote out the list and gave it to him.

The man took the baby to the supermarket and put him in the shopping cart. Then he pushed the shopping cart along the rows of things and looked for those that were on his list.

At first everything was OK, but then the baby began to cry.

Then he started to scream.

And scream!

And SCREAM!

“Keep calm, George,” the man said. “Don’t get excited. Don’t shout, George. Don’t lose your temper, George.”

A woman in the supermarket heard him saying so. She walked up to him.

“I think you are wonderful,” she said. “You are so patient with your little George.”

“Madam,” the man said, “I’m George. He’s Edward.”

小题1:The man took care of the baby instead because his wife was      .

A.ill

B.busy doing housework

C.angry

D.going to buy things小题2:The baby cried so hard       .

A.at home

B.in the supermarket

C.in the street

D.in the car小题3:When the baby was crying, the father kept taking to      for relaxing.

A.his baby

B.the woman

C.himself

D.George小题4:The underlined sentence “Don’t lose your temper.” in this passage means“   ”.

A.become angry

B.shut up

C.walk on

D.calm down

判断题