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;
"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.
(46)
A.business
B.action
C.life
D.search