SOLUTION: A random sample of 20 amounts lost by gamblers who took a bus to an Atlantic City casino has a mean of​ $189. Assuming that sigma σ ​= $87, construct an 98% confidence interva

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Question 1156058: A random sample of 20 amounts lost by gamblers who took a bus to an Atlantic City casino has a mean of​ $189. Assuming that sigma σ ​= $87, construct an 98% confidence interval.
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
z(0.99)=2.33
half-interval is z*sigma/sqrt(n)=2.33*87/sqrt(20)=45.33
($144, $234), rounding