Two machines were used to fill 8g bottles. The filling process can be considered normal with standard deviations of 1 = 0.15 and 2 = 0.2. Data were collected to show whether these two machines fill 8g or not.
data:
machine 1 machine 2
8.63 8.62
8.64 8.57
8.65 8.56
8.60 8.61
8.60 8.59
8.61 8.63
8.59 8.63
8.59 8.62
8.62 8.61
8.59 8.60

Formulate a hypothesis for this situation