总体显著性检验不包括（)

A.F检验

B.t检验

C.Z检验

D.卡方检验

A.戈德菲尔德—匡特检验

B.德宾—沃森检验

C.t检验

D.显著性检验

A.德宾—沃森

B.戈德菲尔德—匡特检验法

C.t检验

D.最小二乘法

测得6名糖尿病患者的血糖Y，胰岛素X1，及生长素X2的值如表8—24所示。

建立Y关于X的同归方程，并对回归方程作显著性检验；

ght with him. A few meters away, there was a small shop by the side of the road where a woman was frying fish and selling it to travelers. The woman watched the poor traveler carefully, and when he finished his food and began to go, she shouted rudely, "You have not paid me for the fried fish？

"But I have not had any fried fish!" he said.

"But everyone can see that you enjoyed the smell of my fried fish with your rice and veg- etables," said the woman, "If you had not smelled the fish, your meal would not have been so pleasant !"

Soon a crowd collected, and although they supported the poor traveler, they had to ad- mit that wind was blowing from the shop to the place where he had eaten, and that it had carried the smell of the fried fish to him.

Finally, the woman took the poor traveler to a judge, who said, "The woman says that the traveler ate his meal with the smell of her fried fish. The traveler agrees that the wind was blowing the smell of her fried fish to his nose while he was eating, so he must pay for it." "What does your fried fish cost？" he asked the woman.

"Twenty-five cents a plate," she answered delighted.

"Then go outside together," said the judge. "There the traveler must hold up a twenty five-cent piece so that a shadow(影子) falls on the woman's hand. The price of the smell of a plate of fried fish is the shadow of twenty-five cents."

Why did the traveler refuse to pay the woman for the fried fish？ Because______.

A．he was poor

B．he was rude

C．he was supported by a crowd

D．he hadn't eaten her fried fish at all

测定某金属片的抗张力y与硬度x的关系，得到如下表所示的试验数椐．

xi(HB)	51	53	51	51	53	55	57	51	51	55
yi(kg·mm-2)	44	50	41	44	47	56	56	50	47	56

检验抗张力y与硬度x之间是否存在显著性的线性相关关系，如果存在，求关于x的线性回归方程．

ken. Mr. Sanders, the man who started this【21】 was not always very rich. At one time, he【22】 a small gas station next to a highway. Many truck drivers【23】 here to get gas and take a rest. Mr. Sanders realized they were often【24】 , so he began serving sandwiches and coffee.【25】 the sandwiches he made tasted good and didn't【26】 too much, more and more【27】 came to eat at his place.【28】 Mr. Sanders began to serve fried chicken. People【29】 it very much, and his new business grew rapidly. Not long after,【30】 , another highway was built, and many drivers no longer went to Mr. Sander' s restaurant. So he had to close it. Then he traveled around the country, trying to sell his idea of opening fried chicken restaurants. He succeeded. By 1967, there were almost 5000 Kentucky Fried Chicken restaurants. And now, wherever you go in the US, you will see one. If you like chicken, I' m sure, you will enjoy eating Kentucky Fried Chicken.

(46)

A．business

B．action

C．life

D．search