A vending machine that dispenses coffee into cups must fill cups with
7.8 ounces. Before selling this machine you must check the system to
make sure it fills cups with 7.8 ounces of coffee. Your standard
deviation is .05 and you are 95% sure it will fill correctly. You take
20 samples.  Does it fill each cup with 7.8 oz?  Why?
7.78	7.79	7.83	7.75
7.82	7.82	7.85	7.83
7.87	7.84	7.84	7.73
7.79	7.82	7.82	7.87
7.80	7.78	7.81	7.88