A manufacturing company has been averaging 18.2 orders per week for several years. However, during a recession weekly orders have appeared to slow. Suppose the company’s production manager randomly samples 32 weeks during the recession period and finds a sample mean of 15.6 orders per week. The population standard deviation is 2.3 orders per week. Test in order to determine whether the average number of weekly orders has decreased in the recession period, using α = 0.10.