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Question
An environmental group at a local college is conducting independent tests to determine the distance a particular make of automobile will travel while consuming only 1 gallon of gas. They test a sample of five cars and obtain a mean of 28.2 miles. How many cars should the environmental group test if they wish to estimate μ, mean miles per 1 gallon, to within 0.5 miles and be 99 percent confident? Assume a population standard deviation of 2.7 miles.A. 25
B. 124
C. 194
D. 618
E. 619
Answer
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