Kindly explain in a clear format. Consider the ff. variables when answer the I. question: (a) Income and hours worked. (b) respondents confidence in health care system and trust in doctors. QUESTION: Does one's confidence in the health system correlate to their household income? kindly explain (1) the factors of the tests (2) explain WHY ETA test is used to determine the answer. Please cite proper literature (such as journal articles, etc.)