Abloomberg businessweek north american subscriber study collected data from a sample of 2861 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? 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.

Suppose a ceiling fan manufacturer has the total cost function c(x) = 48x + 1485 and the total revenue function r(x) = 75x. (a) what is the equation of the profit function p(x) for this commodity? p(x) = (b) what is the profit on 35 units? p(35) = interpret your result. the total costs are less than the revenue. the total costs are more than the revenue. the total costs are exactly the same as the revenue. (c) how many fans must be sold to avoid losing money? fans

Onsider the following subscription behavior information from genie, a web site that provides tools for constructing a family tree (ancestor search). subscriptions cost $9.99 per month, but you are charged for the entire year at the time of purchase. there is a one-year minimum term when you sign up for the service. once purchased, subscriptions are set to renew automatically unless the subscriber cancels them. when a membership renews, it renews for a one-year term and again you are charged for the entire year. there are no variable costs associated with providing this service to an individual customer, but genie does engage in customer relationship activities that they believe will increase customer retention. these customer relationship activities cost genie about $10 per year per customer. based on a sample of 1000 customers that joined genie five years ago, near the time when the company was founded, they were able to determine how many of those customers remained subscribers in the second year, third year etc. based on this information, genie calculated the average annual retention rate to be 20%. genie uses an annual discount rate of 8%. a. last year, genie spent $10,000 placing advertisements on google. genie management believes that these advertisements were responsible for about 300 new subscribers. would you recommend to genie management that they purchase more google ads? b. suppose a newly-introduced loyalty program increases the number of customers that remained to 30%. does this new data change your answer to 9.a? c. do you have any hesitations or concerns about making recommendations to management based on your above estimate of customer lifetime value?

Choose the statement that is incorrect. a. search activity occurs only in markets where there is a shortage. b. when a price is regulated and there is a shortage, search activity increases. c. the time spent looking for someone with whom to do business is called search activity. d. the opportunity cost of a good is equal to its price plus the value of the search time spent finding the good.