6. A clinical trial compares two different drugs for the control of blood glucose in patients with diabetes. The trial uses something called a "crossover" design. Half of the participants are randomly chosen to receive the first drug for the first two months of the trial, while the other half receive the second drug. Then, after two months, the participants are given the other drug, that they didn't receive the first time. This second phase of the trial again continues for two months. Each patient has their average glucose (as measured by a continuous glucose monitor) recorded for each of these drugs. Is it appropriate to use a two-sample z test for experiments that we discussed in class to analyze the results of this trial? Answer YES or NO and explain your answer in 1-2 sentences