A researcher asks 40 pupils (from a school with 200 pupils) to participate in an experiment on altruism. The 40 pupils constitute a: A. population B. control group C. sample D. variable

A researcher asks 250 students (from a school with 1000 pupils) to complete a survey about the cafereria. The 250 students are a:a. populationb. case studyc. sampled. variable

A second group of researchers find 400 participants who are screened for things like lifestyle preferences. They use a computer program to assign 100 participants to each of the 3 treatment groups and 100 participants to the control group. These participants will receive free groceries for life in exchange for their participation. Researchers follow up with participants once every 10 years to collect data on their health for the rest of their life.This can be considered an experiment because the researchers used:Hint, displayed belowRandom AssignmentLurking VariablesSample SurveyExperimental Design

generalization to social experiment

Which of the following statements best characterizes an experiment?Multiple choice question.an artificially created situation that allows researchers to manipulate variablesa series of identical questions asked of a large number of participantsthe collection of information through direct participation or by closely watching a group or communityany method that is considered by the scientific community to be both unethical and unscientific

Sarah is a researcher at a children's psychiatric center. Her office has just been asked to conduct a pilot study on a new prescription medication used to treat anxiety called Drug X. Sarah wants to figure out if Drug X causes a reduction in anxiety-like the drug company claims. How can Sarah answer this question through a true experiment? Group of answer choicesSarah needs to randomly assign half of her participants to the treatment group and half to a control group for her studySarah needs to conduct a field experiment and should not worry about the random assignment of participants.Sarah needs to randomly assign her participants, and she must only conduct her study at different stages of participants’ lives.