Twenty randomly selected statistics students were given 15 multiple-choice questions and 15 open-ended questions, all on the same material. The professor was interested in determining if students scored higher on the multiple-choice questions. This experiment is an example of .

a. a test of proportions
b. a one-sample test of means
c. a paired t-test
d. a two-sample test of means

Alyeska services company, a division of a major oil company, provides various services to the operators of the north slope oil field in alaska. data concerning the most recent year appear below: sales $18,000,000 net operating income $6,300,000 average operating assets $35,200,000 1. compute the margin for alyeska services company. (round your answer to 2 decimal places.) 2. compute the turnover for alyeska services company. (round your answer to 2 decimal places.) 3. compute the return on investment (roi) for alyeska services company. (round your intermediate calculations and final answer to 2 decimal places.)

Kevin and jenny, who are both working full-time, have three children all under the age of ten. the two youngest children, who are three and five years old, attended eastside pre-school for a total cost of $3,000. ervin, who is nine, attended big kid daycare after school at a cost of $2,000. jenny has earned income of $15,000 and kevin earns $14,000. what amount of childcare expenses should be used to determine the child and dependent care credit?

Asemiprofessional baseball team near your town plays two home games each month at the local baseball park. they split the concessions 50/50 with the city, but keep revenue from ticket sales for themselves. the city charges the team $100 each month for the three-month season. the team pays the players and manager a total of $1,000 a month. the team charges $10 for each ticket, and the average customer spends $7 at the concession stand. attendance averages 30 people at each home game. in order to break even, how many tickets does the team need to sell for each game? a. 33b. 37c. 41e. 49f. 244