The lifespan of xenon metal halide arc-discharge bulbs for aircraft landing lights is normally distributed with a mean of 3,000 hours and a standard deviation of 500 hours. If a new bal- last system shows a mean life of 3,515 hours in a test on a sample of 10 prototype new bulbs, would you conclude that the new lamp's mean life exceeds the current mean life at 5 .01? What is the p-value?