duuyen30 duuyen30

07-05-2024
Mathematics

Answered

Điều tra một mẫu(n>30) về dấu hiệu X trên đám đông. Dựa vào mẫu điều tra, ước
lượng trung bình dấu hiệu X của đám đông, với độ tin cậy 95%.

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