Mathematics, 28.06.2021 09:50 vandarughb2875

Khảo sát ngẫu nhiên 196 gia đình trong một khu vực ta thấy chi tiêu trung bình mẫu của một gia đình là 2,56 triệu đồng/tháng và độ lệch chuẩn mẫu là 0,78 triệu đồng/tháng. Hãy xác định khoảng tin cậy
đối xứng 96% cho chi tiêu trung bình của một gia đình trong khu vực này.
♡ (2,4691; 2,6428). B (2,4267; 2,6834). © (2,4456; 2,6744). D (2,4168; 2,6943).

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Khảo sát ngẫu nhiên 196 gia đình trong một khu vực ta thấy chi tiêu trung bình mẫu của một gia đình...

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