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Mathematics, 20.06.2021 16:30 alyssabalinnt
Đường kính của 100 chi tiết do một máy sản xuất, kết quả cho ở bảng sau: X(mm) 19 20 22 23 24 25 26 Số chi tiết 5 19 20 18 16 12 10 Những chi tiết có đường kính từ 20mm đến 24mm là những chi tiết đạt tiêu chuẩn. Muốn ước lượng tỷ lệ chi tiết đạt tiêu chuẩn có độ tin cậy 95% thì sai số cần có là bao nhiêu
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Đường kính của 100 chi tiết do một máy sản xuất, kết quả cho ở bảng sau: X(mm) 19 20 22 23 24 25 26...
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