The residential division of prism’s high-speed internet service uses one advertising agency while its commercial division uses another. two analysts, andy and brad, are asked to test evaluate the effectiveness of the two agencies. andy proposes an a/b test that compares the click-through rates per ad for the two agencies. brad proposes a difference-in-difference test in which the budgets for both agencies are increased by 50% and the percent change in click-through rates are compared. what might be the sources of selection bias for the two proposals? which is likely to be smaller?

Alex is a working professional and has managed to save a small amount of money from his earnings. he wants to invest in something that is customized to his risk appetite. which financial institution should he choose? a. hedge funds b. mutual funds c. life insurance companies d. credit unions e. pension funds

Xyz corporation has provided the following data concerning manufacturing overhead for july: actual manufacturing overhead incurred $ 69,000 manufacturing overhead applied to work in process $ 79,000 the company's cost of goods sold was $243,000 prior to closing out its manufacturing overhead account. the company closes out its manufacturing overhead account to cost of goods sold. which of the following statements is true? multiple choice manufacturing overhead was overapplied by $10,000; cost of goods sold after closing out the manufacturing overhead account is $253,000 manufacturing overhead was underapplied by $10,000; cost of goods sold after closing out the manufacturing overhead account is $233,000 manufacturing overhead was underapplied by $10,000; cost of goods sold after closing out the manufacturing overhead account is $253,000 manufacturing overhead was overapplied by $10,000; cost of goods sold after closing out the manufacturing overhead account is $233,000

In the united states, one worker can produce 10 tons of steel per day or 20 tons of chemicals per day. in the united kingdom, one worker can produce 5 tons of steel per day or 15 tons of chemicals per day. the united kingdom has a comparative advantage in the production of: