9.Mr.Kim owns a gas station in Seoul.Hisbusiest hour is from 11 to noon.On May 5th,Mr.Kim’sdaughter surveyed 36 customers.She foundthat the 36 people bought average of 12 gallons ofgasoline with a standard deviation of 4gallons.Find a point estimat

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9.Mr.Kim owns a gas station in Seoul.Hisbusiest hour is from 11 to noon.On May 5th,Mr.Kim’sdaughter surveyed 36 customers.She foundthat the 36 people bought average of 12 gallons ofgasoline with a standard deviation of 4gallons.Find a point estimat

9.Mr.Kim owns a gas station in Seoul.Hisbusiest hour is from 11 to noon.On May 5th,Mr.Kim’sdaughter surveyed 36 customers.She foundthat the 36 people bought average of 12 gallons ofgasoline with a standard deviation of 4gallons.Find a point estimat
9.Mr.Kim owns a gas station in Seoul.Hisbusiest hour is from 11 to noon.On May 5th,Mr.Kim’s
daughter surveyed 36 customers.She foundthat the 36 people bought average of 12 gallons of
gasoline with a standard deviation of 4gallons.
Find a point estimate for μ,the meannumber of gallons of gas people buy?
Establish a .95 confidence interval for
Establish a .99 confidence interval for
中英文回答皆可,

9.Mr.Kim owns a gas station in Seoul.Hisbusiest hour is from 11 to noon.On May 5th,Mr.Kim’sdaughter surveyed 36 customers.She foundthat the 36 people bought average of 12 gallons ofgasoline with a standard deviation of 4gallons.Find a point estimat
均值μ与样本的均值一致,为12加仑.μ的标准差为4/(36^0.5)=2/3,所以95%的置信区间为12+(-)(2/3)*1.96；99%的置信区间为12+(-)(2/3)*2.576.

12
(12-4, 12+4)
(12-8, 12+8)

9.Mr.Kim owns a gas station in Seoul.Hisbusiest hour is from 11 to noon.On May 5th,Mr.Kim’sdaughter surveyed 36 customers.She foundthat the 36 people bought average of 12 gallons ofgasoline with a standard deviation of 4gallons.Find a point estimat My friend,Mr.Kim,is a policeman.His dog helps him catch criminals.英文翻译中文. mr smith owns a larger collection of coinsthan anyone else i have ever met .为什么用a加比较级 He owns a nice computer. 英语填空mr.smith owns collection of coins than anyone else i have ever met.A.larger B.a larger C.the largest D.a large Kim He owns a house的同义句 His father owns a famous restaurant.译文 同义句 He owns a nice computer That the world owns no man a living,but that it owns every gas gas 3.(2005山东卷)28.Mr.Smith owns ______ collection of coins than anyone else I have ever met.A.larger B.a larger C.the larger D.a large 用英文翻译句子:Mr li owns the supermarket in the town 用英文解释句子:Mr li owns the supermarket in the town exergy of a gas turbine 回答：Is Kim a big boy?______________________. Is Kim a big boy?越快越好