A sheet metal manufacturer is making 10-gauge sheet metal, which is supposed to be 3.416 mm thick. One of the pieces of manufact
uring equipment was suspected of malfunctioning, so the manufacturer tested a random sample of 100 pieces of steel to make sure the average steel thickness is 3.416 mm. Which of the following is a statement of the null hypothesis?A. The equipment is making the sheet metal too thick. The average average steel thickness is greater than 3.416 mm.B. The equipment is not working properly. The average average steel thickness is not 3.416 mm.C. The equipment is working properly. The average average steel thickness is 3.416 mm.
We need to evaluate if thickness of a 10 gauge metal sheet is a requiered in the process that means 3.416 mm thick. So that should be our null hypothesis; μ₀ = 3.416 and based on sample data, we will formulate an alternative hypothesis taking into account the mean, and standard deviation obtained. We surely will have better information to take a decision
