A researcher tracks the weights of babies born in a particular hospital. She identifies the number of babies falling in each of the following weight classes: 0-2 lbs, 2.1-4 lbs, 4.1-6 lbs, 6.1-8 lbs, 8.1-10 lbs. What is the class interval for this frequency distribution?

When asked to count the four soda bottles placed in from of him, three-year-old Eli says, "1, 3, 4, there are 4!" When asked to count the bottles a second time, he says, "2, 5, 7, 4, there are 4!" Eli's counting skills demonstrate that he is capable of demonstrating the ____ principle of counting

a. one-to-one b. cardinality c. organization d. stable-order

Shana cannot remember anything about the months prior to the plane crash she was in, nor can she remember anything about the accident itself. Shana is experiencing ____ amnesia.?

a. ?anterograde b. ?psychogenic c. ?hippocampal d. ?retrograde