Mathematics, 18.06.2021 16:10 joset238

Một giáo viên lớp 9 mong muốn xem chương trình chính tả mới có giúp giảm được lỗi chính tả trong bài viết của học sinh không. Số lỗi chính tả của học sinh trước và sau khi chương trình được thực hiện có số liệu như sau. Tại α = 0.05, chương trình có hoạt động hiệu quả không (có thể sử dụng giá trị p-value để so sánh)? Trước 8 3 10 5 9 11 12 Sau 6 4 8 1 4 7 11

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