A researcheris tryingto discover the averageage at death for peoplein theUnited Statestoday. Toobtaindata, for 30days, and theagesatdeathof peoplein theUnitedStatesarenoted. Doyou think this approach will lead to a representative sample?

Which point is on the line y=-2+3? (-2,-1) (3,3) (3,-3) (-3,-9)

20 da is equal to a. 2,000 cm. b. 2 m. c. 20,000 cm. d. 20,000 mm

Researchers were interested in whether relaxation training decreases the number of headaches a person experiences. they randomly assigned 20 participants to a control group or a relaxation training group and noted the change in number of headaches each group reported from the week before training to the week after training. which statistical analysis should be performed to answer the researchers' question?