Mathematics, 17.06.2021 17:20 macylen3900

Chiều cao của thanh niên là biến ngẫu nhên phân phối chuẩn với trung bình là 170cm và độ lệch chuẩn là 10cm. Chọn ngẫu nhiên 31 thanh niên vùng đó. A) Tìm xác suất để chiều cao trung bình của số thanh niên nói trên không vượt quá 172cm. B) Tìm xác suất để độ lệch chuẩn về chiều cao của số thanh niên nói trên lớn hơn 15cm.

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Chiều cao của thanh niên là biến ngẫu nhên phân phối chuẩn với trung bình là 170cm và độ lệch chuẩn...

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