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Mathematics, 16.06.2021 14:00 kalbaugh
Mỗi hộp cà phê hoà tan của một nhà máy quy định có trọng lượng là 50gam. lấy ngẫu nhiên 49 hộp của lô hàng mới xuất xưởng để kiểm tra thì được các số liệu sau:
xi=48, mi=1, xi=38,5, mo=1, x1=4, mi=4
hãy ước lươgnj khoảng trọng lượng trung bình của hộp cà phê với độ tin cậy là 95%
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Mỗi hộp cà phê hoà tan của một nhà máy quy định có trọng lượng là 50gam. lấy ngẫu nhiên 49 hộp của l...
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