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4 July, 19:35

To find the average grades scored by students in science and math, the principal of a school sends a questionnaire to the top five students in each grade of the high school. Is the sample used by the principal random? Will a generalization from this sample be valid?

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  1. 4 July, 23:07
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    I'm pretty sure it's random and won't be valid. But I'm not positive
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