Dr. fletcher is interested in whether joining a fraternity/sorority causes people to become more concerned about their attractiveness and appearance. he recruits a group of 55 freshmen (25 males, 30 females) who are planning to go through fraternity/sorority recruitment on his campus. after they join, he gives them a measure of attractiveness/appearance concern (the body concern scale).questionif dr. fletcher is interested in a causal relationship between joining a fraternity/sorority and attractiveness/appearance concern, why doesn't he conduct a true experiment? 1. because it is not possible to study private organizations, like fraternities/ sororities.2. because it is not possible to measure body concern .3. because he was unable to recruit more people.4. because he was unable to recruit an equal number of males and females.5. because he was unable to randomly assign participants to join a fraternity/sorority.

8. agreement and disagreement among economists suppose that bob, an economist from a university in arizona, and cho, an economist from a public television program, are arguing over saving incentives. the following dialogue shows an excerpt from their debate: cho: i think it's safe to say that, in general, the savings rate of households in today's economy is much lower than it really needs to be to sustain an improvement in living standards. bob: i think a switch from the income tax to a consumption tax would bring growth in living standards. cho: you really think households would change their saving behavior enough in response to this to make a difference? because i don't. the disagreement between these economists is most likely due to . despite their differences, with which proposition are two economists chosen at random most likely to agree? rent ceilings reduce the quantity and quality of available housing. immigrants receive more in government benefits than they contribute in taxes. having a single income tax rate would improve economic performance.

Forecasting as a first step in the team’s decision making, it wants to forecast quarterly demand for each of the two types of containers for years 6 to 8. based on historical trends, demand is expected to continue to grow until year 8, after which it is expected to plateau. julie must select the appropriate forecasting method and estimate the likely forecast error. which method should she choose? why? using the method selected, forecast demand for years 6 to 8.

The lee family is looking to buy a house in one of two suburban areas just outside of a major city, and air quality is a top priority for them. overall air quality is calculated by taking measures in 100 locations within each suburb and then calculating a measure of central tendency. in one suburb, there is a major bus station that creates very poor air quality at its location but has no impact in the surrounding parts of the suburb. in this situation, which measure of overall suburb air quality would be most useful?