Items 38-42 use a similar scenario as other problems on this exam; however, use the information presented in this item to respond to this item and the 4 items that follow. An educational researcher interested in the health of kids conducted a study on the weight of 3rd grade students. To obtain the sample, the researcher obtained a list of 350 public elementary schools located in the southeastern US and collected a random sample of 5 schools. Each 3rd grader in the 5 randomly selected schools participated in the study, resulting in a total of 408 students. The researcher wanted to see if the average weight for students in the southeastern part of the US was different from the average weight for all 3rd graders in the US, which is 75 pounds based on data from the National Health Organization. She found that the average weight for 3rd grade students in the sample was 78 pounds with a standard deviation of 2.3 pounds