1. Classify each of the following data sets as qualitative or quantitative. a. The lengths of pregnancies of a group of gorillas being studied in the wild. b. The last four digits of social security numbers. 2) adult Americans support the idea of a federally funded health care system? A popular news station asked this question to their viewers then asked them to call in their response. The station was hoping to estimate the proportion of adult Americans that support the idea of a federally funded health care system. The station received 500 calls of which 290 stated they supported the idea. a. What is the population being studied? b. What is the parameter of interest? c. What is the sample size? d. What is the value of the statistic? e. Explain why the results of the survey are likely biased. 3) A CNET News article reported that the artery walls of people living within 100 meters of a highway thicken more than twice as fast as the average person's. Researchers used ultrasound to measure the carotid artery wall of thickness of 1483 people living near freeways in the Los Angeles area. The artery wall thickness among those living within 100 meters of a highway increased by 5.5 micrometers each year during the three-year study, which is more than twice the progression observed in participants who did not live within this distance of a highway. a. What are the explanatory and response variables? b. Explain why this study is not an experiment. c. Can one conclude that living near a highway is bad for your heart as it increases the thickness of the carotid artery wall based on the results of this study? Why