A particular brand of tires claims that its deluxe tire averages at least 50,000 miles before it needs to be replaced. From past studies of this tire, the standard deviation is known to be 8,000. A survey of owners of that tire design is conducted. Of the 31 tires surveyed, the mean lifespan was 46,300 miles with a standard deviation of 9,800 miles.

Using alpha = 0.05, is the data highly consistent with the claim?