An automated machine is calibrated to fill bags of pretzels so that each bag weighs 8 ounces. A worker at the factory believes the machine is not filling the bags to the correct weight. She randomly selects 40 bags of pretzels and, after weighing them, calculates their mean weight to be 8.4 ounces. Write null and alternative hypothesis to describe this situation. (1 point) OH, p=8 H. p 8 O Ho =8 H 8 OH: =8.4 H: 8.4 OH =8 H: >8