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26-10-2022
Mathematics

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Mrs. kerns plan to give a math achievement test to samples of 15-year-old students from both the u.s. and korea in order to compare mathematics knowledge in the two countries. in each country, she will randomly select 300 students from low-income families, 400 students from middle-income families, and 200 students from high-income families. the sample from korea is a

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