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Mathematics, 25.05.2021 06:10 egyptforrest9892

A principal orders t-shirts and wants to check some of them to make sure they were printed properly, he randomly selects 7 of the 10 boxes and checks 20 in one box and 40 in others. What type of sample is this? (It's not random sampling btw)

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A principal orders t-shirts and wants to check some of them to make sure they were printed properly,...

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