A sociologist studies youth responses to violent videos. She conducts an experiment in which she has teenagers rank photos of individuals on a scale of likability after watching either violent or neutral videos. To obtain her desired sample size of 100, she collects data from 20 children at one school, 50 children at a second school and 30 children from a third school. Which of the following statements provides the best statistical advice for this investigator? Question 24 options: The observations in this data set cannot be considered independent because children are grouped by school which can affect the variance estimates. Methods from an introductory statistics class will not suffice for analyzing these data. These data can be analyzed by a paired t-test, assuming all children rank photos after watching both types of videos. These data can be analyzed by an independent t-test, assuming children are randomly assigned to either neutral or violent videos only. Either the paired or independent t-tests can be used. Lack of independence between observations is not an issue because students from the same school are not likely to influence each other or to be more similar than students from different schools