Question

A student 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

Answer 1

The student's survey method was not a controlled experiment and may be subject to bias, as it included younger siblings and potentially lacked random sampling.

Step-by-step explanation:

The student wanting to determine how his classmates feel about school did not conduct a well-designed, controlled experiment. Surveys can provide valuable information when done correctly, but the inclusion of younger siblings means the survey now includes data from a population that is not restricted to his classmates. Furthermore, if the survey was not conducted with a random sample, it could suffer from selection bias, which can skew results. For an accurate reflection of the classmates' feelings, the survey should target a specific population—in this case, the student's classmates—and ideally should employ random selection to minimize potential biases. Moreover, a survey is a form of an observational study, not a controlled experiment, as it does not involve manipulating variables and observing the outcome.

Answer 2

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