Which of the following statements about why children in our country receive care from someone other than their parents is true? a. the cost of day care has gone down. b. more than 90 percent of children in our country have mothers who work. c. child care professionals are better equipped to care for children. d. children spend more time in child care due to changing family structure and work responsibilities.

True of false: the chancellor of a university has commissioned a team to collect data on students' gpas and the amount of time they spend bar hopping every week (measured in minutes). he wants to know if imposing much tougher regulations on all campus bars to make it more difficult for students to spend time in any campus bar will have a significant impact on general students' gpas. his team should use a t test on the slope of the population regression.