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Unit 6 Weird ways to pass the time Are you looking for a new way to pass the time? Get inspiration by reading about some of these very weird hobbies! Appearing in the background on TV Paul Yarrow is a guy who has an unusual hobby: he likes to appear on television. Whenever a news camera crew is set up in a public place, he hangs around in the background on camera. He has appeared in the background of live news reports at a whole range of locations and random times. It seems like if there is a camera crew about, then Paul is there too! Creating the world’s largest ball of paint The work of an interior decorator can be challenging, but there are always ways to have a little fun. Back in 1977, Mike Carmichael decided to paint a baseball. Covered with more than 22,000 coats of paint, the ball weighs over 1,500 kilograms. People from all around the world have come to add a coat of paint to the ball, which is even mentioned in Guinness World Records. Extreme ironing What would you do if you were ironing and a friend asked you to come rock climbing? Phil Shaw was in this situation. He chose to go climbing, taking his iron with him, and a new hobby was born. Extreme ironing has now spread around the world. Peo ple iron their shirts on kayaks, mountaintops, and even in the middle of skydiving. So you see, the only limit when it comes to hobbies is your own imagination. Have fun!
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【单选题】在多元线性回归分析中,t检验主要用来检验( )。
A.
各自变量前的偏回归系数的显著性
B.
总体线性关系的显著性
C.
样本线性关系的显著性
D.
β1=β2=…=βk=0
【单选题】在多元线性回归分析中,t检验是用来检验( )
A.
总体线性关系的显著性
B.
各回归系数的显著性
C.
样本线性关系的显著性
D.
H0:β1=β2=……=βk=0
【单选题】He supplements his ________ income by working on Saturdays.
A.
copious
B.
meager
C.
sterile
D.
scant
【简答题】Text 1: aswarm, peer, sumptuous, suave, meager, fetching, trudge, uncanny, irksome Text 2: threshold, harness, abundance, concession, mitigate, implication Text 3: accumulate, deter, ruminate, forego,...
【单选题】What do we know about Carrel Smith?
A.
He is a 63-year-old doctor studying the preventing of cancer.
B.
He is working at M. D. Anderson Cancer Center and taking part in the trial.
C.
He is wondering about taking selenium and vitamin E supplements in preventing cancer.
D.
His ex-brother-in-law was diagnosed to have prostate cancer.
【简答题】AV Clip 11: The Truth of Vitamins AV 3+5+6+7+8+9+10+11 The Truth about Vitamins Supplements.mp4 Watch the video clip three times and complete the following passage by filling in each blank with the wo...
【单选题】在一元线性回归分析中,计算估计标准误差所使用的自由度为
A.
n    
B.
n-p
C.
n-p-1    
D.
n-p+1
【多选题】在一元线性回归分析中,对简单相关系数r来说,结论正确的有( )。
A.
-1≤r≤1
B.
r=1,完全正线性相关
C.
r=-1,完全负线性相关
D.
r=0,不线性相关
E.
r>1
【判断题】一元线性回归分析中,回归平方和 SSR的自由度是1.
A.
正确
B.
错误
【多选题】线性回归分析中( )
A.
自变量是可控制量,因变量是随机的
B.
两个变量不是对等的关系
C.
利用一个回归函数,两个变量可以互相推算
D.
根据回归系数可判定相关的方向
E.
对于没有明显因果关系的两变量可求得两个回归函数
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