A manufacturing company produces valves in various sizes and

Last updated: 2/5/2024

A manufacturing company produces valves in various sizes and shapes One particular valve plate is supposed to have a tensile strength of 5 pounds per millimeter lbs mm The company tests a random sample of 42 such valve plates from a lot of 650 valve plates The sample mean is a tensile strength of 5 0611 lbs mm and the population standard deviation is 0 2803 lbs mm Use a 0 10 and test to determine whether the lot of valve plates has an average tensile strength of 5 lbs mm