a restaurant owner installed a new automated drink machine. the machine is designed to dispense 530\text{ ml}530 ml530, start text, space, m, l, end text of liquid on the medium size setting. the owner suspects that the machine may be dispensing too much in medium drinks. they decide to take a sample of 303030 medium drinks to see if the average amount is significantly greater than 530\text{ ml}530 ml530, start text, space, m, l, end text. what are appropriate hypotheses for their significance test?