Mathematics, 26.02.2021 19:30, delgadillogiselle711

One thousand and twenty students participated in the school math contest. A random sample (Sample 1) from grades 9 and 10 showed scores of: 72, 89, 67, 81, 75, 79, 81, 80, 62, 64, 83.
A random sample (Sample 2) of grades 11 and 12 showed scores of: 84, 86, 87, 84, 86, 89, 90, 87, 87, 84, 86.

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One thousand and twenty students participated in the school math contest. A random sample (Sample 1...