13) Most analysts focus on the cost of tuition as the way to measure the cost of a college education. But incidentals, such as textbook costs, are rarely considered. A researcher at Drummand University wanted to estimate the textbook costs of first-year students at Drummand. To do so, she monitored the textbook cost of 250 first-year students and found that their average textbook cost was $600 per semester. Identify the population of interest to the researcher. A) ab 250 t A Wall Street Journal poll asked 2,150 adults in the United States a series of questions to find out their view on the U.S. economy. 20) Referring to Table 1, the possible responses to the question "How many more months do you think the U.S. economy will require to get out of a recession?" are values from a A) parameter. B) continuous numerical random variable. D) categorical random variable. C) discrete numerical random variable. ONE TABLE 2