Mathematics, 15.04.2020 19:14 bob4964
An analyst from an energy research institute in California wishes to estimate the 90% confidence interval for the average price of unleaded gasoline in the state. In particular, she does not want the sample mean to deviate from the population mean by more than $0.05. What is the minimum number of gas stations that she should include in her sample if she uses the standard deviation estimate of $0.31, as reported in the popular press
Answers: 2
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