A researcher is interested in knowing whether millennials preference for getting the COVID vaccine or not is related to whether they have health care insurance or not. What is the appropriate null hypothesis for a chi-square test of independence? Group of answer choices Millennials preference for the vaccine is related to their status of health insurance. More millennials are in favor of getting the vaccine. More millennials are do not want the vaccine. There are equals number of millennials that are in favor and not in favor of getting the vaccine