Estimate true population mean gas tax with confidence

Reference no: EM13124670

A random sample of state gas taxes (in cents) is shown here for 12 states. Use the data to estimate the true population mean gas tax with 90% confidence. Does your interval contain the national average of 21 cents?
21.5, 20, 20, 23, 25.3, 31, 16, 17, 20.7, 28, 25.9, 30.

Reference no: EM13124670

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