A Bloomberg Businessweek North American subscriber study collected data from a sample of 2,861 subscribers. Fifty-nine percent of the respondents indicated an annual income of $75,000 or more and 50% reported having an American Express credit card. (a) What is the population of interest in this study? the percentage of subscribers of Businessweek in North America who have an American Express card the percentage of subscribers of Businessweek in North America who have an annual income of $75,000 or more the 50% of respondents who reported having an American Express card all subscribers of Businessweek who participated in the survey all subscribers of Businessweek in North America at the time the survey was conducted (b) Is annual income a categorical or quantitative variable? categorical quantitative (c) Is ownership of an American Express card a categorical or quantitative variable? categorical quantitative (d) Does this study involve cross-sectional or time series data? cross sectional time series (e) Describe any statistical inferences Bloomberg Businessweek might make on the basis of the survey. Using the sample results, we could infer or estimate 59% of the population of subscribers have an ---Select--- Or more and coo