Part II: Short Answer. Point values for each question are shown in parentheses. In general, you should show your work and/or explain how you arrived at your answer in order to receive full credit. I. (18 points) What percentage of U.S. brides keep their own names after marriage, as opposed to taking their husband's name or using some modification (such as hyphenation) of her name and her husband's? Researchers investigated this question by selecting a random sample of wedding announcements in the New York Times newspaper (Kopelman et al., 2009). They found that 21% of a sample of 550 brides selected between 2002 and 2005 kept their own names. a. Identify the observational units and variable in this study. b. Identify the population and sample in this study. c. Identify (in words and using an appropriate symbol) the parameter of interest