A particular brand of oven claims that its deluxe oven averages at least 50,000 hours of baking before it needs to be replaced. From past studies of this type of oven, the standard deviation is known to be 8,000. A survey of owners of that type of oven was conducted. From the 28 ovens surveyed, the mean lifespan was 46,500 hours with a standard deviation of 9,800 hours. Using alpha = 0.05, are the data highly inconsistent with the claim?