Question: The average age of customers walking in off the street into a local clothing store as sampled to be 22.4 years old with a standard deviation of 5 years (61 people were sampled). Determine for the manager if the average age of customers walking in off the street is over 20. At what confidence can she reach her conclusion? Explain what both a type I error and a type II would be in this situation (using the language of the problem)