Tammy conducted a survey to find the favorite subject of the students at her school. She asked 25 students from her math class what their favorite subject is. Tammy concludes that math is the favorite subject of the students at her school because 60% of the students in her class like math.
Use at least two sentences to explain why Tammy's sample may not be valid.
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tammy's sample may not be valid because
it was only collected from single class not from different classes of school.....
samples are to be taken not from the total population of one region but from small groups of different regions...