A random sample of 25 roundtrip flights between Philadelphia and Dallas has an average airfare of $393.50 with a sample standard deviation of $50.30. The 95% confidence interval around this sample mean is ------ .
A)($353.26, $433.74)
B)($388.47, $398.53)
C)($383.44, $403.56)
D)($372.74, $414.26)

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The Answer of A random sample of 25 roundtrip flights between Philadelphia and Dallas has an average airfare of $393.50 with a sample standard deviation of $50.30. The 95% confidence interval around this sample mean is ------ .
A)($353.26, $433.74)
B)($388.47, $398.53)
C)($383.44, $403.56)
D)($372.74, $414.26)

A Random Sample of 25 Roundtrip Flights Between Philadelphia and Dallas