The owner of a food store was concerned about her sales of a yogurt. To help boost? sales, she decided to place the product on a different shelf. She kept track of sales? (number of containers sold per? week) for six months after she made the change. The values are in a? stem-and-leaf display, along with the sales numbers for the six months prior to making the change. Do these results suggest that sales are better after the? change? Test an appropriate hypothesis and state your conclusion. Be sure to check assumptions and conditions. Assume ?=0.05