1. The quality control section of a purchasing contract for valves specifies that the diameter must be between 2.53 and 2.57 centimeters. Assume that the production equipment is set so that the...

1. The quality control section of a purchasing contract for valves specifies that the diameter must be between 2.53 and 2.57 centimeters. Assume that the production equipment is set so that the diameter follows normal distribution with mean diameter 2.56 centimeters and the standard deviation 0.01 centimeters. What is the percent of valves produced, over the long run, will be within these specifications?