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](/uploads/image/z/6794498-2-8.jpg?t=9.Mr.Kim+owns+a+gas+station+in+Seoul.Hisbusiest+hour+is+from+11+to+noon.On+May+5th%2CMr.Kim%E2%80%99sdaughter+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
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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
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)