Marci spends 14 hours researching and writing a 22-page report for her philosophy class. jack brags that he has a "streamlined process" for performing the researching and writing. jack takes just 5 hours to research and write the paper, but his report is only 25 pages long. a. the output is the input is marcis productivity is (enter your response rounded to two decimal places.) jacks productivity is (enter your response rounded to decimal places.) this is a productivity measure. what are the limitations of using productivity measures to evaluate marcis and jacks performance? a. the productivity measures increase proportionally to time needed for research. b. the productivity measure should be greater than 1. c. the quality of the work is not assessed. d. time needed for the research is not given.

Suppose that xtel currently is selling at $40 per share. you buy 500 shares using $15,000 of your own money, borrowing the remainder of the purchase price from your broker. the rate on the margin loan is 8%. a. what is the percentage increase in the net worth of your brokerage account if the price of xtel immediately changes to (a) $44; (b) $40; (c) $36? (leave no cells blank - be certain to enter "0" wherever required. negative values should be indicated by a minus sign. round your answers to 2 decimal places.) b. if the maintenance margin is 25%, how low can xtel’s price fall before you get a margin call? (round your answer to 2 decimal places.) c. how would your answer to requirement 2 would change if you had financed the initial purchase with only $10,000 of your own money? (round your answer to 2 decimal places.) d. what is the rate of return on your margined position (assuming again that you invest $15,000 of your own money) if xtel is selling after one year at (a) $44; (b) $40; (c) $36? (negative values should be indicated by a minus sign. round your answers to 2 decimal places.) e. continue to assume that a year has passed. how low can xtel’s price fall before you get a margin call? (round your answer to 2 decimal places.)

The 39 percent and 38 percent tax rates both represent what is called a tax "bubble." suppose the government wanted to lower the upper threshold of the 39 percent marginal tax bracket from $335,000 to $208,000. what would the new 39 percent bubble rate have to be? (do not round intermediate calculations. enter your answer as a percent rounded to 2 decimal places,e.g., 32.16.)

True or false: a fitted model with more predictors will necessarily have a lower training set error than a model with fewer predictors.