Shipments of light bulbs are acceptable to a distributor if the mean life is at least 1000 hours. A random sample of 48 light bulbs is to be taken, and a test is to be done at the 5% level of significance. Assume that the population standard deviation is 50 hours. What is the probability of making a Type II error if the "true" mean is 990 hours? In this problem, what are the consequences of making a Type II error?