Mathematics, 19.08.2021 14:00 arubright177
Cho X, Y là hai biến ngẫu nhiên cùng tuân theo 1 quy luật phân phối xác suất, với EX=EY=m chưa biết, VX=4, VY=3, X ngnag là trung bình của mẫu có kích thước bằng 3, Y ngang là trung bình của mẫu có kích thước bằng 4, Z=a * Xngang +b*Yngang, tìm a b để Z là ước lượng không chệch của m
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Cho X, Y là hai biến ngẫu nhiên cùng tuân theo 1 quy luật phân phối xác suất, với EX=EY=m chưa biết,...
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