In: Statistics and Probability
Founded in 1846, Hood is a Charlestown company with more than $2 billion in annual sales. The company has 15 plants and uses filling machines for its gallon milk containers. There is some variation in the actual amount of milk that goes into the container. The machine can go out of adjustment and put a mean amount either less or more than one-gallon containers. To monitor the filling process, the production manager for the Sacramento plant selects a simple random sample of 16 gallons each day. He can test whether the machine is still in adjustment using the following steps: Set up a hypothesis Set up a suitable significance level Determine a suitable test statistic Determine the critical region Perform computations Make decision to accept or reject hypothesis