Waste is an important factor to monitor in many manufacturing processes. When the variability of material used in a process is too high, engineers often must make changes to the process to avoid expensive wastage. An anti-rust spray uses a liquid that is sprayed on all surfaces of a certain type of racing car, and the amount used on each car was determined to be a normally distributed random variable. You recorded the fluid amount sprayed on each car of a randomly selected sample of 25 cars to have a sample mean x =100 fluid ounces and a sample standard deviation of S= 20.4025 fluid ounces. a) Test the hypothesis that the true mean of sprayed amount Ho: # = 100 versus: HI: #