Astudent wants to determine how his classmates feel about school. he does a survey away from school so all participants will be willing to answer freely. in several cases, younger siblings of his classmates are present, so he lets them take the survey too. he surveys a total of 50 students. has he done a well-designed, controlled experiment?
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Astudent wants to determine how his classmates feel about school. he does a survey away from school...
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