Problem: Pew Research Center is a nonpartisan polling organization that provides information about issues, attitudes, and trends. Suppose in a poll of 10,351 adults in the United States, Pew found that 17% of those polled have used, invested in, or traded digital currency known as cryptocurrency. Of those who responded to the poll, 23% of men and 11% of women indicated that they had used, invested in, or traded cryptocurrency. (a) To what population does the statistic 17% refer?