Question 6 1 pts It has been claimed that beetroot juice reduces blood pressure. Suppose that a team of scientists decides to investigate whether this claim holds by doing three different experiments using three different designs. (1) A group of randomly selected individuals are randomly assigned to two groups. One group is given beetroot juice every day for 4 weeks and the other group is given a red drink that looks like beetroot juice every day for 4 weeks. After 4 weeks, the blood pressure for both groups is measured. (2) The blood pressure of a group of randomly selected individuals was measured before they were given any study-related treatment. One day after everyone had their blood pressure measured, they were given beetroot juice every day for 4 weeks. Their blood pressure was measured again at the end of the study. The difference in blood pressure was analyzed. (3) A group of randomly sampled individuals with known high blood pressure was given beetroot juice every day for 4 weeks. After 4 weeks, their blood pressure was measured. The average blood pressure at the end of the study was compared to the value of 140/90mmHg, which is the level where high blood pressure is diagnosed. Which type of hypothesis test should be done for each of the above designs