Suppose Taxi Fare from Logan Airport to Downtown Boston Is

question 119

Multiple Choice

Suppose taxi fare from Logan Airport to downtown Boston is known to be normally distributed with a standard deviation of $2.50. The last seven times John has taken a taxi from Logan to downtown Boston, the fares have been $22.10, $23.25, $21.35, $24.50, $21.90, $20.75, and $22.65. What is a 95% confidence interval for the population mean taxi fare?

• A) [$17.46, $27.26]
• B) [$20.46, $24.16]
• C) [$20.80, $23.91]
• D) [$21.66, $23.06]

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