SeeClear Windows makes windows for use in homes and commercial buildings. The standards for glass thickness call for the glass to average 0.375 inches with a standard deviation equal to 0.050 inches. Suppose a random sample of n = 50 windows yields a sample mean of 0.392 inches.
a. What is the probability of  ≥ 0.392 if the windows meet the standards?
b. Based on your answer to part a, what would you conclude about the population of windows? Is it meeting the standards?