We are interested in finding the median distance that a specific model of car can go with a full tank of fuel. An expert believes that the median distance that the cars can travel is less than 450 kilometers. A sample of 8 has been selected, and their travel distance with a full tank is recorded as below. Please conduct an appropriate test at the 0.05 significance level to check the correctness of the expert claim.

Travel distances: 450, 467, 487, 441, 437, 456, 448, 421