Determine whether the given description corresponds to an observational study or an experiment.
-Children with attention deficit hyperactivity disorder are randomly divided into four treatment groups (the Tomatis Method, the Dore Method, the Brain Gym, and a control group) to compare differences in focus and concentration.
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Q7: Determine the type of sampling used: systematic,
Q8: Determine the type of sampling used: systematic,
Q9: Determine whether the given value is a
Q10: Determine which of the four levels of
Q11: Identify the type of observational study: cross-sectional,
Q13: The following questions relate to random samples
Q14: Determine the type of sampling used: systematic,
Q15: Determine whether the given values are from
Q16: Identify the type of observational study: cross-sectional,
Q17: Determine whether the given values are from
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