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Mathematics, 25.07.2021 05:00 cuavang55

điều tra 100 công nhân công ty a thấy có 30 công nhân có thu nhập hàng năm từ 54 triệu đồng trở lên. Điều tra 150 công nhân công ty B thấy có 60 công nhân có thu nhập hàng năm từ 54 triệu đồng trở lên. Với mức ý nghĩa 5% thì tỷ lệ công nhân có thu nhập hàng năm từ 54 triệu đồng tở lên của 2 công ty có như nhau hay không?

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điều tra 100 công nhân công ty a thấy có 30 công nhân có thu nhập hàng năm từ 54 triệu đồng trở lên....
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