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19. A Bloomberg Businessweek North American subscriber study collected data from a sample s. Fifty-nine percen $75.00 or more, and 50% reported having an American Express credit card. a. What is the population of interest in this study? b. Is annual income a categorical or quantitative variable? c. Is ownership of an American Express card a categorical or quantitative variable? d. Does this study involve cross-sectional or time series data? e. Describe any statistical inferences Bloomberg Businessweek might make on the basis of the survey.
math   Statistics-And-Probability   
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